| Decimal | 161 |
| Binary | 10100001 |
| Hexadecimal | 0xa1 |
| Roman | CLXI |
| Dotted decimal | 0.0.0.161 |
| Square root of | 25921 |
| Factors | 23 7 |
| English | one hundred sixty-one |
| Wikipedia Article about 161 | Wikipedia Article about 161 |
| RGB Color | #0000a1, |
| Number info: CLXI: ASCII code for | Inverted exclamation mark |
| random from 1 to 6 | Show |
| random from 1 to 10 | Show |
| random from 1 to 100 | Show |
| random from 1 to 1000 | Show |