231541012505121 has 16 divisors (see below), whose sum is σ = 336825876108288. Its totient is φ = 140311657688400.

The previous prime is 231541012504981. The next prime is 231541012505249. The reversal of 231541012505121 is 121505210145132.

It is not a de Polignac number, because 231541012505121 - 2¹⁸ = 231541012242977 is a prime.

It is a super-2 number, since 2×231541012505121² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (231541012504121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405427285 + ... + 405997986.

It is an arithmetic number, because the mean of its divisors is an integer number (21051617256768).

Almost surely, 2^{231541012505121} is an apocalyptic number.

It is an amenable number.

231541012505121 is a deficient number, since it is larger than the sum of its proper divisors (105284863603167).

231541012505121 is a wasteful number, since it uses less digits than its factorization.

231541012505121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811433932.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 231541012505121 in words is "two hundred thirty-one trillion, five hundred forty-one billion, twelve million, five hundred five thousand, one hundred twenty-one".