320303213131021 has 2 divisors, whose sum is σ = 320303213131022. Its totient is φ = 320303213131020.

The previous prime is 320303213130977. The next prime is 320303213131061. The reversal of 320303213131021 is 120131312303023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206974115694025 + 113329097436996 = 14386595^2 + 10645614^2 .

It is a cyclic number.

It is not a de Polignac number, because 320303213131021 - 2¹⁷ = 320303212999949 is a prime.

It is a super-2 number, since 2×320303213131021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320303213131061) 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 as a sum of consecutive naturals, namely, 160151606565510 + 160151606565511.

It is an arithmetic number, because the mean of its divisors is an integer number (160151606565511).

Almost surely, 2^{320303213131021} is an apocalyptic number.

It is an amenable number.

320303213131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

320303213131021 is an equidigital number, since it uses as much as digits as its factorization.

320303213131021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 320303213131021 its reverse (120131312303023), we get a palindrome (440434525434044).

The spelling of 320303213131021 in words is "three hundred twenty trillion, three hundred three billion, two hundred thirteen million, one hundred thirty-one thousand, twenty-one".