How Many Zeros in a Duovigintillion?
A duovigintillion has 69 zeros: 1069. Written out, it is the digit 1 followed by 69 zeros, giving a 70-digit number. In the short-scale system used in the United States and modern British English, duovigintillion follows unvigintillion (1066) and comes before trevigintillion (1072). The name combines duo (two) and viginti (twenty), placing it 22nd in the "-illion" sequence. In the long-scale system used in parts of continental Europe, a duovigintillion represents 10132 — roughly double the exponent of the short-scale definition. Learn more about how many zeros does a quintillion have.
A duovigintillion has
69
zeros
- Written Form
- 1 followed by 69 zeros
- Scientific
- 10⁶⁹
What Has 69 Zeros?
The number with 69 zeros is called a duovigintillion. Written out: 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000. It contains 23 groups of three zeros, confirming 3 × 23 = 69 zeros. In scientific notation this is simply 1069. Related: Million zeros.
The easiest way to confirm the zero count for any "-illion" is the formula 3n + 3, where n is the name's position in the sequence starting from million as position 1. For duovigintillion at position 22: 3 × 22 + 3 = 69.
| Name | Zeros | Scientific Notation |
|---|---|---|
| Unvigintillion | 66 | 1066 |
| Duovigintillion | 69 | 1069 |
| Trevigintillion | 72 | 1072 |
How Many Zeros in 10 Duovigintillion and 1,000 Duovigintillion?
- 1 duovigintillion = 1069 — 69 zeros
- 10 duovigintillion = 1070 — 70 zeros
- 100 duovigintillion = 1071 — 71 zeros
- 1,000 duovigintillion = 1072 — 72 zeros (= one trevigintillion)
The long-scale duovigintillion, at 10132, has 132 zeros — exactly double the short-scale exponent, following the long-scale rule that assigns each "-illion" as (106)n. For all practical English-language purposes, duovigintillion means 69 zeros and 1069. Learn more about how many zeros in a duodecillion.