Q: What is the negative version of the number 21,512,221?
A: -21,512,221
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:
| 21,512,219 | 21,512,220 | 21,512,222 | 21,512,223 |
| -21,512,219 | -21,512,220 | -21,512,222 | -21,512,223 |