121 in Roman Numerals
CXXI
121 in Roman numerals is CXXI, and is spelled one hundred twenty-one.
How to write 121 in Roman numerals
To write 121 in Roman numerals, combine C (100), XX (20) and I (1) to get CXXI.
The numeral CXXI is read from left to right, from the largest value to the smallest, adding each symbol as you go.
| Value | Roman |
|---|---|
| 100 | C |
| 20 | XX |
| 1 | I |
| 121 | CXXI |
Facts about the number 121
- 121 is an odd number.
- 121 is a composite number. Its prime factorization is 112.
- The digits of 121 add up to 4.
- 121 has 3 divisors.
- 121 is a perfect square (112).
121 in other number systems
| Decimal | 121 |
| Roman | CXXI |
| Binary | 1111001 |
| Octal | 171 |
| Hexadecimal | 79 |
Frequently asked questions
How do you write 121 in Roman numerals?
121 is written as CXXI in Roman numerals.
What does the Roman numeral CXXI mean?
CXXI represents the number 121 (one hundred twenty-one).
Is 121 a prime number?
No, 121 is a composite number.
What is 121 in binary and hexadecimal?
121 is 1111001 in binary and 79 in hexadecimal.
Related numbers
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