11110...32211 (24-digits)

This number is a prime.

1111 0199887766 5544332211

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The prime formed from reverse concatenation of first 11 multidigit palindromic numbers, i.e., from 11 to 111. [Gupta]

Submitted: 2019-04-14 00:57:42; Last Modified: 2019-04-14 01:42:24.