How Many Zeros in a Duodecillion?
How many zeros in a duodecillion? A duodecillion has 39 zeros: 1,000,000,000,000,000,000,000,000,000,000,000,000,000, or 1039 in scientific notation. In the short-scale system, duodecillion follows undecillion (1036) and comes before tredecillion (1042). Related: Million zeros.
A duodecillion has
39
zeros
- Written Form
- 1 followed by 39 zeros
- Scientific
- 10³⁹
Verifying Duodecillion's Zero Count
The direct answer: exactly 39 zeros — 13 groups of three, since duodecillion is the 13th name in the short-scale "-illion" sequence counting from million. The prefix duo- means two, combined with dec- for ten. Learn more about zeros in a novemdecillion.
Verifying the Zero Count
The zero count is easy to check: 39 = 3 × 13, meaning 13 groups of three zeros. Each group corresponds to one step up the naming ladder from million (1 group) through duodecillion (13 groups). The word is pronounced "doo-oh-deh-SILL-ee-on."
Duodecillion vs Its Neighbors
| Name | Zeros | Scientific notation |
|---|---|---|
| Undecillion | 36 | 1036 |
| Duodecillion | 39 | 1039 |
| Tredecillion | 42 | 1042 |
How Many Zeros in 10 Duodecillion and 1,000 Duodecillion?
- 1 duodecillion =
1039— 39 zeros - 10 duodecillion =
1040— 40 zeros - 1,000 duodecillion =
1042— 42 zeros (= one tredecillion)
In the long-scale system used in parts of continental Europe, a duodecillion instead means 1072 — double the short-scale exponent.
Zeros in a Duodecillion: FAQ
What comes before a duodecillion?
Quick answer
Hundred undecillion comes right before a duodecillion.
What comes after a duodecillion?
Quick answer
Ten duodecillion comes next, followed by hundred duodecillion and then tredecillion.
How many digits does a duodecillion have?
A duodecillion has 40 digits in total — that's the digit 1 followed by 39 zeros.
How many zeros in 2 duodecillion? In half a duodecillion?
Two duodecillion keeps the same 39 zeros. Half a duodecillion has 38 trailing zeros after the 5.
Is a 39-digit number always a duodecillion?
No. A 39-digit number tops out at hundreds of undecillions — a duodecillion is the first 40-digit number.
How many zeros in a duodecillion in the British system?
Under the old long-scale system, a duodecillion meant 1072 — 33 more zeros than today's short-scale duodecillion.