231131212011320 has 32 divisors (see below), whose sum is σ = 520114502408400. Its totient is φ = 92440169180928.

The previous prime is 231131212011263. The next prime is 231131212011419. The reversal of 231131212011320 is 23110212131132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384559205 + ... + 385159764.

Almost surely, 2^{231131212011320} is an apocalyptic number.

231131212011320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231131212011320 is an abundant number, since it is smaller than the sum of its proper divisors (288983290397080).

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

231131212011320 is a wasteful number, since it uses less digits than its factorization.

231131212011320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769726487 (or 769726483 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231131212011320 its reverse (23110212131132), we get a palindrome (254241424142452).

The spelling of 231131212011320 in words is "two hundred thirty-one trillion, one hundred thirty-one billion, two hundred twelve million, eleven thousand, three hundred twenty".