Q: What is the negative version of the number 21,505,211?
A: -21,505,211
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:
| 21,505,209 | 21,505,210 | 21,505,212 | 21,505,213 |
| -21,505,209 | -21,505,210 | -21,505,212 | -21,505,213 |