Q: What is the negative version of the number 21,221,221?
A: -21,221,221
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:
| 21,221,219 | 21,221,220 | 21,221,222 | 21,221,223 |
| -21,221,219 | -21,221,220 | -21,221,222 | -21,221,223 |