Q: What is the negative version of the number 21,521,721?
A: -21,521,721
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 21,521,719 | 21,521,720 | 21,521,722 | 21,521,723 |
| -21,521,719 | -21,521,720 | -21,521,722 | -21,521,723 |