311122013321 has 4 divisors (see below), whose sum is σ = 355568015232. Its totient is φ = 266676011412.

The previous prime is 311122013297. The next prime is 311122013339. The reversal of 311122013321 is 123310221113.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123310221113 = 2969 ⋅41532577.

It is a cyclic number.

It is not a de Polignac number, because 311122013321 - 2²² = 311117819017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311122013293 and 311122013302.

It is not an unprimeable number, because it can be changed into a prime (311122013821) 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, 22223000945 + ... + 22223000958.

It is an arithmetic number, because the mean of its divisors is an integer number (88892003808).

Almost surely, 2^311122013321 is an apocalyptic number.

It is an amenable number.

311122013321 is a deficient number, since it is larger than the sum of its proper divisors (44446001911).

311122013321 is an equidigital number, since it uses as much as digits as its factorization.

311122013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44446001910.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311122013321 its reverse (123310221113), we get a palindrome (434432234434).

The spelling of 311122013321 in words is "three hundred eleven billion, one hundred twenty-two million, thirteen thousand, three hundred twenty-one".