321311321331 has 64 divisors (see below), whose sum is σ = 576129662976. Its totient is φ = 153830275200.

The previous prime is 321311321299. The next prime is 321311321339. The reversal of 321311321331 is 133123113123.

It is not a de Polignac number, because 321311321331 - 2⁵ = 321311321299 is a prime.

It is a super-2 number, since 2×321311321331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321311321339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1810110 + ... + 1979676.

It is an arithmetic number, because the mean of its divisors is an integer number (9002025984).

Almost surely, 2^321311321331 is an apocalyptic number.

321311321331 is a deficient number, since it is larger than the sum of its proper divisors (254818341645).

321311321331 is a wasteful number, since it uses less digits than its factorization.

321311321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170232.

The product of its digits is 972, while the sum is 24.

Adding to 321311321331 its reverse (133123113123), we get a palindrome (454434434454).

The spelling of 321311321331 in words is "three hundred twenty-one billion, three hundred eleven million, three hundred twenty-one thousand, three hundred thirty-one".