How Many Zeros in a Tredecillion?
How many zeros in a tredecillion? A tredecillion has 42 zeros: 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000, or 1042 in scientific notation. The short-scale system defines tredecillion as 14 groups of three zeros beyond the ones place — the 14th name in the sequence. Related: Million zeros.
A tredecillion has
42
zeros
- Written Form
- 1 followed by 42 zeros
- Scientific
- 10⁴²
The Tre- Prefix and Tredecillion's Position
The direct answer: exactly 42 zeros. The prefix tre- means three combined with dec- for ten, placing it 14th on the short-scale ladder. See also: Zeros in a nonillion.
Is a Tredecillion a Real Number?
Yes. A tredecillion is a legitimate, formally defined cardinal number equal to 1042 in the US short-scale system — not slang or an informal estimate. It follows the same systematic Latin-prefix convention used for every standard "-illion" name.
Tredecillion vs Its Neighbors
| Name | Zeros | Scientific notation |
|---|---|---|
| Duodecillion | 39 | 1039 |
| Tredecillion | 42 | 1042 |
| Quattuordecillion | 45 | 1045 |
How Many Zeros in 10 Tredecillion and 100 Tredecillion?
- 1 tredecillion =
1042— 42 zeros - 10 tredecillion =
1043— 43 zeros - 1,000 tredecillion =
1045— 45 zeros (= one quattuordecillion)
The long-scale alternative of 1078 uses the same word "tredecillion" because both systems derive their names from the same Latin roots — only the step size differs. Learn more about zeros in a quintillion.
Zeros in a Tredecillion: FAQ
What comes before a tredecillion?
Quick answer
Hundred duodecillion comes right before a tredecillion.
What comes after a tredecillion?
Quick answer
Ten tredecillion comes next, followed by hundred tredecillion and then quattuordecillion.
How many digits does a tredecillion have?
A tredecillion has 43 digits in total — that's the digit 1 followed by 42 zeros.
How many zeros in 2 tredecillion? In half a tredecillion?
Two tredecillion keeps the same 42 zeros. Half a tredecillion has 41 trailing zeros after the 5.
Is a 42-digit number always a tredecillion?
No. A 42-digit number tops out at hundreds of duodecillions — a tredecillion is the first 43-digit number.
How many zeros in a tredecillion in the British system?
Under the old long-scale system, a tredecillion meant 1078 — 36 more zeros than today's short-scale tredecillion.