How Many Zeros in a Vigintillion?
By Vinitha Published Updated
How many zeros in a vigintillion? A vigintillion has 63 zeros in the short-scale system used in the United States and modern British English: 1063. The name comes from the Latin viginti (twenty) — the 20th "-illion" name after a million. Questions about long-scale naming differences are answered in how many zeros does a quadrillion have.
A vigintillion has
63
zeros
- Written Form
- 1 followed by 63 zeros
- Scientific
- 10⁶³
The Zero-Count Formula Applied to Vigintillion
The direct answer: exactly 63 zeros. The general formula for any "-illion" zero count is 3n + 3, where n is its position in the sequence starting from million as position 1. For vigintillion at position 20: 3 × 20 + 3 = 63.
What Does 1 Vigintillion Look Like?
Written out in full, one vigintillion is the digit 1 followed by exactly 63 zeros, spanning 64 digits in total and 21 groups of three digits. How many zeros does a decillion have covers chemical reactions across the universe alongside 10³³ in scientific notation.
Vigintillion is the largest "-illion" name that appears in most general-interest English dictionaries — though it's far from the largest formally named number.
Is Vigintillion the Biggest Named Number?
Not even close. The naming system continues with unvigintillion (1066), duovigintillion (1069), and so on up through centillion (10303), which itself is dwarfed by numbers like a googol (10100) and a googolplex (10googol).
- Why vigintillion often marks a dictionary boundary
- Words like "septendecillion" and "octovigintillion" rarely appear in everyday writing, so many reference books stop at vigintillion as a convenient endpoint
How Many Zeros in 10 Vigintillion and 100 Vigintillion?
- 1 vigintillion =
1063— 63 zeros - 10 vigintillion =
1064— 64 zeros - 100 vigintillion =
1065— 65 zeros
Short Scale vs Long Scale
| System | Zeros | Scientific notation |
|---|---|---|
| Short scale (US / modern UK) | 63 | 1063 |
| Long scale (continental Europe) | 120 | 10120 |
Watch: How Many Zeros in a Vigintillion?
How many zeros in a vigintillion? A vigintillion has 63 zeros — 1 followed by 63 zeros. Watch this short video for the zero count, the written form and the notation at a glance.
Zeros in a Vigintillion: FAQ
What comes before a vigintillion?
Quick answer
Hundred novemdecillion comes right before a vigintillion.
What comes after a vigintillion?
Quick answer
Ten vigintillion comes next, followed by hundred vigintillion and then unvigintillion.
How many digits does a vigintillion have?
A vigintillion has 64 digits in total — that's the digit 1 followed by 63 zeros.
How many zeros in 2 vigintillion? In half a vigintillion?
Two vigintillion keeps the same 63 zeros. Half a vigintillion has 62 trailing zeros after the 5.
Is a 63-digit number always a vigintillion?
No. A 63-digit number tops out at hundreds of novemdecillions — a vigintillion is the first 64-digit number.
How many zeros in a vigintillion in the British system?
Under the old long-scale system, a vigintillion meant 10120 — 57 more zeros than today's short-scale vigintillion.
About the Author
Designer and Developer · Palakkad, Kerala, India
Vinitha holds a bachelor's degree in Textile and Apparel Design from Avinashilingam University, plus a C-Tech certificate in Graphic Design from Image Creative Education. She builds free, no-clutter reference tools like How Many Zeros. Read her full bio.