311331322321 has 8 divisors (see below), whose sum is σ = 317089209024. Its totient is φ = 305621219280.

The previous prime is 311331322297. The next prime is 311331322363. The reversal of 311331322321 is 123223133113.

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 311331322321 - 2²⁷ = 311197104593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311331322381) 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, 11932765 + ... + 11958826.

It is an arithmetic number, because the mean of its divisors is an integer number (39636151128).

Almost surely, 2^311331322321 is an apocalyptic number.

It is an amenable number.

311331322321 is a deficient number, since it is larger than the sum of its proper divisors (5757886703).

311331322321 is a wasteful number, since it uses less digits than its factorization.

311331322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23891831.

The product of its digits is 1944, while the sum is 25.

Adding to 311331322321 its reverse (123223133113), we get a palindrome (434554455434).

The spelling of 311331322321 in words is "three hundred eleven billion, three hundred thirty-one million, three hundred twenty-two thousand, three hundred twenty-one".