231311101121 has 4 divisors (see below), whose sum is σ = 231319965744. Its totient is φ = 231302236500.

The previous prime is 231311101081. The next prime is 231311101127. The reversal of 231311101121 is 121101113132.

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 not a de Polignac number, because 231311101121 - 2⁶ = 231311101057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231311101121.

It is not an unprimeable number, because it can be changed into a prime (231311101127) 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, 4393055 + ... + 4445396.

It is an arithmetic number, because the mean of its divisors is an integer number (57829991436).

Almost surely, 2^231311101121 is an apocalyptic number.

It is an amenable number.

231311101121 is a deficient number, since it is larger than the sum of its proper divisors (8864623).

231311101121 is an equidigital number, since it uses as much as digits as its factorization.

231311101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8864622.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 231311101121 its reverse (121101113132), we get a palindrome (352412214253).

The spelling of 231311101121 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred one thousand, one hundred twenty-one".