12491...11753 (216-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

                                                                      124914
9041047939 8338397337 3763953353 9437437331 3371331311 3703392382 1827721729
6236275215 2142932332 9227223221 1299179139 1191181971 3717613617 5115194193
1731131721 3119017013 0110179983 8973717761 6953574341 4731392329 1713111753

The largest non-titanic prime formed from the reversal of the ordered concatenation of the first n odd prime numbers (case n=81). [Gupta]