121231231311031 has 16 divisors (see below), whose sum is σ = 128524927541248. Its totient is φ = 114149012637600.

The previous prime is 121231231311007. The next prime is 121231231311041. The reversal of 121231231311031 is 130113132132121.

It is a cyclic number.

It is not a de Polignac number, because 121231231311031 - 2¹⁵ = 121231231278263 is a prime.

It is a super-2 number, since 2×121231231311031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121231231310987 and 121231231311005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231231311041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327103216 + ... + 327473626.

It is an arithmetic number, because the mean of its divisors is an integer number (8032807971328).

Almost surely, 2^{121231231311031} is an apocalyptic number.

121231231311031 is a deficient number, since it is larger than the sum of its proper divisors (7293696230217).

121231231311031 is a wasteful number, since it uses less digits than its factorization.

121231231311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655822.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 121231231311031 its reverse (130113132132121), we get a palindrome (251344363443152).

The spelling of 121231231311031 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, two hundred thirty-one million, three hundred eleven thousand, thirty-one".