231031121120010 has 40 divisors (see below), whose sum is σ = 621217014569316. Its totient is φ = 61608298965120.

The previous prime is 231031121119979. The next prime is 231031121120027. The reversal of 231031121120010 is 10021121130132.

231031121120010 is a `hidden beast` number, since 2 + 310 + 31 + 121 + 1 + 200 + 1 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216052340240961 + 14978780879049 = 14698719^2 + 3870243^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 142611802351 + ... + 142611803970.

Almost surely, 2^{231031121120010} is an apocalyptic number.

231031121120010 is an abundant number, since it is smaller than the sum of its proper divisors (390185893449306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231031121120010 is a wasteful number, since it uses less digits than its factorization.

231031121120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285223606340 (or 285223606331 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 231031121120010 its reverse (10021121130132), we get a palindrome (241052242250142).

The spelling of 231031121120010 in words is "two hundred thirty-one trillion, thirty-one billion, one hundred twenty-one million, one hundred twenty thousand, ten".