121231312414111 has 2 divisors, whose sum is σ = 121231312414112. Its totient is φ = 121231312414110.

The previous prime is 121231312414073. The next prime is 121231312414127. The reversal of 121231312414111 is 111414213132121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121231312414111 - 2⁷ = 121231312413983 is a prime.

It is a super-2 number, since 2×121231312414111² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121231312414111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121231312454111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615656207055 + 60615656207056.

It is an arithmetic number, because the mean of its divisors is an integer number (60615656207056).

Almost surely, 2^{121231312414111} is an apocalyptic number.

121231312414111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231312414111 is an equidigital number, since it uses as much as digits as its factorization.

121231312414111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

Adding to 121231312414111 its reverse (111414213132121), we get a palindrome (232645525546232).

The spelling of 121231312414111 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred twelve million, four hundred fourteen thousand, one hundred eleven".