111,111,111 * 111,111,111 = 12345678987654321
The outcome of 111,111,111 * 111,111,111 is what we call a mathematical palindrome; 12345678987654321.
A palindrome means that you can read the word (or in this case, the number) in any direction and the order of the individual characters stay the same.
The word palindrome itself comes from the Greek words palin (“again”) and dromos (“way, direction”).
Source: Wikipedia
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