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 19 June 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 number-to-words spelling works
A cardinal number names a quantity (four hundred one), while an ordinal names a position (four hundred first). English hyphenates compound numbers from twenty-one to ninety-nine and groups digits into thousands, millions, and billions.
For house-style rules on spelling out numbers, see the Chicago Manual of Style, or read our guide to spelling numbers in words.
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".