Q: What is the negative version of the number 221,521,644?
A: -221,521,644
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:
| 221,521,642 | 221,521,643 | 221,521,645 | 221,521,646 |
| -221,521,642 | -221,521,643 | -221,521,645 | -221,521,646 |