121 in Binary, Roman numerals, Hexadecimal & More
The number 121 is 1111001 in binary, CXXI in Roman numerals, 79 in hexadecimal and 171 in octal.
121 decimal = 1111001 binary
121 in every number system
| System | Written as |
|---|---|
| Binary (base 2) | 111 1001 |
| Roman numerals | CXXI |
| Hexadecimal (base 16) | 79 |
| Octal (base 8) | 171 |
| Duodecimal (base 12) | A1 |
| Ternary (base 3) | 11111 |
| Base 36 | 3D |
| Vigesimal (base 20) | 61 |
| Quaternary (base 4) | 1321 |
| Quinary (base 5) | 441 |
| Senary (base 6) | 321 |
About the number 121
- 121 is an odd number.
- 121 is not a prime number.
- 121 is a perfect square: 11 × 11.
- Written in binary it needs 7 bits, so it fits in one byte.