231113233121 has 4 divisors (see below), whose sum is σ = 231124992192. Its totient is φ = 231101474052.

The previous prime is 231113233063. The next prime is 231113233177. The reversal of 231113233121 is 121332311132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231113233121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231113236121) 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, 5850005 + ... + 5889378.

It is an arithmetic number, because the mean of its divisors is an integer number (57781248048).

Almost surely, 2^231113233121 is an apocalyptic number.

It is an amenable number.

231113233121 is a deficient number, since it is larger than the sum of its proper divisors (11759071).

231113233121 is a wasteful number, since it uses less digits than its factorization.

231113233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11759070.

The product of its digits is 648, while the sum is 23.

Adding to 231113233121 its reverse (121332311132), we get a palindrome (352445544253).

The spelling of 231113233121 in words is "two hundred thirty-one billion, one hundred thirteen million, two hundred thirty-three thousand, one hundred twenty-one".