1,111,111,111/Mistake

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Source Work

1986: David Wells: Curious and Interesting Numbers:

The Dictionary
$297$


1997: David Wells: Curious and Interesting Numbers (2nd ed.):

The Dictionary
$297$


Mistake in First Edition

So is $1,111,111,111$ [a Kaprekar number ], the smallest Kaprekar number of $10$ digits whose square is $12345678900987654321$.


Mistake in Second Edition

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