10052...25001 (121-digits)

This number is a prime.

                    1 0052125001 1005262500 1100534350 0110053535 0011005434
5001100550 5500110054 3450011005 3535001100 5343500110 0526250011 0052125001

The smallest palindromic prime formed from the concatenation of eleven consecutive 11-digit palindromic primes in the pattern {a, b, c, d, e, f, e, d, c, b, a}, i.e., {10052125001, 10052625001, 10053435001, 10053535001, 10054345001, 10055055001, 10054345001, 10053535001, 10053435001, 10052625001, 10052125001}. [Bajpai]