Q: What is the negative version of the number 21,001,561?
A: -21,001,561
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:
| 21,001,559 | 21,001,560 | 21,001,562 | 21,001,563 |
| -21,001,559 | -21,001,560 | -21,001,562 | -21,001,563 |