1,111,111,111/Mistake/Second Edition

Source Work

 * The Dictionary
 * $297$
 * $297$

Mistake

 * So is $1,111,111,111$ [a Kaprekar number ], the smallest Kaprekar number of $10$ digits whose square is $12, 345, 671, 900, 987, 654, 321$.

The square is incorrect. It should be:
 * $1,234,567,900,987,654,321$

The mistake is not repeated under the section for $1,111,111,111$ itself, in which the square is given correctly.

In of $1986$, the number $1,111,111,111^2$ was again given incorrectly in Section $297$, but differently:
 * $12345678900987654321$