-100 is an even number.
-100 is a Harshad number, which means it is divisible by the sum of its digits (1 + 0 + 0 = 1, and -100 is divisible by 1).
In binary, -100 is represented as 1111111111111111111111111111111111111111111111111111111110011100.
In hex, -100 is represented as ffffffffffffff9c.