9801/Mistake

Source Work

 * The Dictionary
 * $9801$
 * $9801$

Mistake

 * $9801 = 99^2$ and $98 + 01 = 99$, so $9801$ is a Kaprekar number.

By the usual definition, this makes $99$ a Kaprekar number, not $9801$. The squares of Kaprekar numbers are not considered to be Kaprekar numbers unless they are Kaprekar in their own right.