311321330321 has 4 divisors (see below), whose sum is σ = 311322472944. Its totient is φ = 311320187700.

The previous prime is 311321330317. The next prime is 311321330389. The reversal of 311321330321 is 123033123113.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 311321330321 - 2² = 311321330317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311321330521) 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, 101486 + ... + 795576.

It is an arithmetic number, because the mean of its divisors is an integer number (77830618236).

Almost surely, 2^311321330321 is an apocalyptic number.

It is an amenable number.

311321330321 is a deficient number, since it is larger than the sum of its proper divisors (1142623).

311321330321 is an equidigital number, since it uses as much as digits as its factorization.

311321330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142622.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 311321330321 its reverse (123033123113), we get a palindrome (434354453434).

The spelling of 311321330321 in words is "three hundred eleven billion, three hundred twenty-one million, three hundred thirty thousand, three hundred twenty-one".