231311123121 has 8 divisors (see below), whose sum is σ = 332139048640. Its totient is φ = 142345306512.

The previous prime is 231311123107. The next prime is 231311123129. The reversal of 231311123121 is 121321113132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231311123121 - 2⁷ = 231311122993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231311123129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965527181 + ... + 2965527258.

It is an arithmetic number, because the mean of its divisors is an integer number (41517381080).

Almost surely, 2^231311123121 is an apocalyptic number.

It is an amenable number.

231311123121 is a deficient number, since it is larger than the sum of its proper divisors (100827925519).

231311123121 is a wasteful number, since it uses less digits than its factorization.

231311123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5931054455.

The product of its digits is 216, while the sum is 21.

Adding to 231311123121 its reverse (121321113132), we get a palindrome (352632236253).

The spelling of 231311123121 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred twenty-three thousand, one hundred twenty-one".