121231311212313 has 80 divisors (see below), whose sum is σ = 188952139164096. Its totient is φ = 77392174204800.

The previous prime is 121231311212191. The next prime is 121231311212357. The reversal of 121231311212313 is 313212113132121.

121231311212313 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 3 + 131 + 1 + 212 + 313 = 666.

It is not a de Polignac number, because 121231311212313 - 2⁸ = 121231311212057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121231311211313) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 239910906 + ... + 240415692.

Almost surely, 2^{121231311212313} is an apocalyptic number.

It is an amenable number.

121231311212313 is a deficient number, since it is larger than the sum of its proper divisors (67720827951783).

121231311212313 is a wasteful number, since it uses less digits than its factorization.

121231311212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506196 (or 506187 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

Adding to 121231311212313 its reverse (313212113132121), we get a palindrome (434443424344434).

The spelling of 121231311212313 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred eleven million, two hundred twelve thousand, three hundred thirteen".