321020131331 has 2 divisors, whose sum is σ = 321020131332. Its totient is φ = 321020131330.

The previous prime is 321020131183. The next prime is 321020131337. The reversal of 321020131331 is 133131020123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321020131331 - 2³⁴ = 303840262147 is a prime.

It is a super-2 number, since 2×321020131331² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321020131337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160510065665 + 160510065666.

It is an arithmetic number, because the mean of its divisors is an integer number (160510065666).

Almost surely, 2^321020131331 is an apocalyptic number.

321020131331 is a deficient number, since it is larger than the sum of its proper divisors (1).

321020131331 is an equidigital number, since it uses as much as digits as its factorization.

321020131331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 321020131331 its reverse (133131020123), we get a palindrome (454151151454).

The spelling of 321020131331 in words is "three hundred twenty-one billion, twenty million, one hundred thirty-one thousand, three hundred thirty-one".