231021344131031 has 4 divisors (see below), whose sum is σ = 233180422113672. Its totient is φ = 228862266148392.

The previous prime is 231021344130989. The next prime is 231021344131037. The reversal of 231021344131031 is 130131443120132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231021344131031 - 2²² = 231021339936727 is a prime.

It is a super-2 number, since 2×231021344131031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231021344130985 and 231021344131003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021344131037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079538991160 + ... + 1079538991373.

It is an arithmetic number, because the mean of its divisors is an integer number (58295105528418).

Almost surely, 2^{231021344131031} is an apocalyptic number.

231021344131031 is a deficient number, since it is larger than the sum of its proper divisors (2159077982641).

231021344131031 is a wasteful number, since it uses less digits than its factorization.

231021344131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159077982640.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 231021344131031 its reverse (130131443120132), we get a palindrome (361152787251163).

The spelling of 231021344131031 in words is "two hundred thirty-one trillion, twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, thirty-one".