Number
221 in Roman numerals
221 is written CCXXI
Type any other number or numeral below to convert it.
Above 3,999? Type the barred part in brackets, e.g. (IV)CC = 4,200.
How CCXXI is built
Roman numerals are written one decimal place at a time, largest first.
- CChundreds · 2C written 2 times: 2 × 100 = 200.
- XXtens · 2X written 2 times: 2 × 10 = 20.
- Iones · 1I is 1.
200 + 20 + 1 = 221
No subtraction is needed here: every letter is the same size or smaller than the one before it, so you simply add them up.
About the number 221
- 221 is odd and can be split into prime factors: 13 × 17, or in Roman numerals XIII × XVII.
- CCXXI has 5 letters. 604 of the numbers up to 1,000 have longer numerals.
Counting from 221 to 230
Every number from 221 to 230 starts CCXX (220); only the ending changes.
| Number | Roman numeral |
|---|---|
| 221 | CCXXI |
| 222 | CCXXII |
| 223 | CCXXIII |
| 224 | CCXXIV |
| 225 | CCXXV |
| 226 | CCXXVI |
| 227 | CCXXVII |
| 228 | CCXXVIII |
| 229 | CCXXIX |
| 230 | CCXXX |