311231123121 has 8 divisors (see below), whose sum is σ = 414991129984. Its totient is φ = 207479265840.

The previous prime is 311231123101. The next prime is 311231123129. The reversal of 311231123121 is 121321132113.

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

It is not a de Polignac number, because 311231123121 - 2³⁵ = 276871384753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311231123129) 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, 1947721 + ... + 2101446.

It is an arithmetic number, because the mean of its divisors is an integer number (51873891248).

Almost surely, 2^311231123121 is an apocalyptic number.

It is an amenable number.

311231123121 is a deficient number, since it is larger than the sum of its proper divisors (103760006863).

311231123121 is a wasteful number, since it uses less digits than its factorization.

311231123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074791.

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

Adding to 311231123121 its reverse (121321132113), we get a palindrome (432552255234).

The spelling of 311231123121 in words is "three hundred eleven billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-one".