401 in Words
How do you write 401 in words?
The number 401 is written four hundred one in words. As an ordinal it is four hundred first, and on a check you would write Four hundred one and 00/100.
Last updated 24 August 2026
Other ways to write it
| Cardinal | four hundred one |
|---|---|
| Ordinal | four hundred first |
| Currency | four hundred one dollars |
| Check format | Four hundred one and 00/100 |
How 401 is written
401 is the sum of its place values, 400 + 1, and is written four hundred one.
Its ordinal form is four hundred first — only the final element takes the ordinal ending — and on a check the amount line reads "Four hundred one and 00/100", where 00/100 stands for zero cents.
British English inserts "and" before the last part, giving four hundred and one, where American English writes four hundred one without it.
Its Roman numeral CDI uses subtractive notation: CD means 400, written as C before D instead of repeating C.
For house-style rules on spelling out numbers, see the Chicago Manual of Style.
Facts about 401
- 401 is an odd number.
- It is a prime number.
- Digit sum: 5.
- Roman numerals: CDI.
- Binary: 110010001.
- Hexadecimal: 191.
| Digit | Place |
|---|---|
| 4 | hundreds |
| 0 | tens |
| 1 | ones |
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Frequently asked questions
How do you write 401 in words?
401 in words is "four hundred one".
How do you spell 401?
401 is spelled "four hundred one".
How do you write 401 on a check?
On a check, write "Four hundred one and 00/100".