311323132121 has 4 divisors (see below), whose sum is σ = 313122687972. Its totient is φ = 309523576272.

The previous prime is 311323132103. The next prime is 311323132177. The reversal of 311323132121 is 121231323113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208369425625 + 102953706496 = 456475^2 + 320864^2 .

It is a cyclic number.

It is not a de Polignac number, because 311323132121 - 2³⁸ = 36445225177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311323132621) 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, 899777666 + ... + 899778011.

It is an arithmetic number, because the mean of its divisors is an integer number (78280671993).

Almost surely, 2^311323132121 is an apocalyptic number.

It is an amenable number.

311323132121 is a deficient number, since it is larger than the sum of its proper divisors (1799555851).

311323132121 is a wasteful number, since it uses less digits than its factorization.

311323132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799555850.

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

Adding to 311323132121 its reverse (121231323113), we get a palindrome (432554455234).

The spelling of 311323132121 in words is "three hundred eleven billion, three hundred twenty-three million, one hundred thirty-two thousand, one hundred twenty-one".