311302012321 has 8 divisors (see below), whose sum is σ = 322068076200. Its totient is φ = 300538049280.

The previous prime is 311302012289. The next prime is 311302012327. The reversal of 311302012321 is 123210203113.

It can be written as a sum of positive squares in 4 ways, for example, as 21238981696 + 290063030625 = 145736^2 + 538575^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 311302012321 - 2⁵ = 311302012289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311302012327) 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, 220726 + ... + 819343.

It is an arithmetic number, because the mean of its divisors is an integer number (40258509525).

Almost surely, 2^311302012321 is an apocalyptic number.

It is an amenable number.

311302012321 is a deficient number, since it is larger than the sum of its proper divisors (10766063879).

311302012321 is a wasteful number, since it uses less digits than its factorization.

311302012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050419.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311302012321 its reverse (123210203113), we get a palindrome (434512215434).

The spelling of 311302012321 in words is "three hundred eleven billion, three hundred two million, twelve thousand, three hundred twenty-one".