311213032321 has 4 divisors (see below), whose sum is σ = 311214232000. Its totient is φ = 311211832644.

The previous prime is 311213032271. The next prime is 311213032327. The reversal of 311213032321 is 123230312113.

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 311213032321 - 2²⁷ = 311078814593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311213032292 and 311213032301.

It is not an unprimeable number, because it can be changed into a prime (311213032327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30741 + ... + 789538.

It is an arithmetic number, because the mean of its divisors is an integer number (77803558000).

Almost surely, 2^311213032321 is an apocalyptic number.

It is an amenable number.

311213032321 is a deficient number, since it is larger than the sum of its proper divisors (1199679).

311213032321 is an equidigital number, since it uses as much as digits as its factorization.

311213032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199678.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311213032321 its reverse (123230312113), we get a palindrome (434443344434).

The spelling of 311213032321 in words is "three hundred eleven billion, two hundred thirteen million, thirty-two thousand, three hundred twenty-one".