311320302321 has 64 divisors (see below), whose sum is σ = 482053718016. Its totient is φ = 175050849600.

The previous prime is 311320302313. The next prime is 311320302343. The reversal of 311320302321 is 123203023113.

It is not a de Polignac number, because 311320302321 - 2³ = 311320302313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311320202321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 314147136 + ... + 314148126.

It is an arithmetic number, because the mean of its divisors is an integer number (7532089344).

Almost surely, 2^311320302321 is an apocalyptic number.

It is an amenable number.

311320302321 is a deficient number, since it is larger than the sum of its proper divisors (170733415695).

311320302321 is a wasteful number, since it uses less digits than its factorization.

311320302321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 311320302321 its reverse (123203023113), we get a palindrome (434523325434).

The spelling of 311320302321 in words is "three hundred eleven billion, three hundred twenty million, three hundred two thousand, three hundred twenty-one".