231021013311 has 12 divisors (see below), whose sum is σ = 364033112040. Its totient is φ = 140012735280.

The previous prime is 231021013261. The next prime is 231021013313. The reversal of 231021013311 is 113310120132.

231021013311 is a `hidden beast` number, since 2 + 310 + 21 + 0 + 1 + 331 + 1 = 666.

It is not a de Polignac number, because 231021013311 - 2⁶ = 231021013247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021013313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1166772696 + ... + 1166772893.

It is an arithmetic number, because the mean of its divisors is an integer number (30336092670).

Almost surely, 2^231021013311 is an apocalyptic number.

231021013311 is a deficient number, since it is larger than the sum of its proper divisors (133012098729).

231021013311 is a wasteful number, since it uses less digits than its factorization.

231021013311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333545606 (or 2333545603 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 231021013311 its reverse (113310120132), we get a palindrome (344331133443).

The spelling of 231021013311 in words is "two hundred thirty-one billion, twenty-one million, thirteen thousand, three hundred eleven".