320023113331021 has 2 divisors, whose sum is σ = 320023113331022. Its totient is φ = 320023113331020.

The previous prime is 320023113330961. The next prime is 320023113331043. The reversal of 320023113331021 is 120133311320023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275756379775396 + 44266733555625 = 16605914^2 + 6653325^2 .

It is a cyclic number.

It is not a de Polignac number, because 320023113331021 - 2²³ = 320023104942413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320023113338021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160011556665510 + 160011556665511.

It is an arithmetic number, because the mean of its divisors is an integer number (160011556665511).

Almost surely, 2^{320023113331021} is an apocalyptic number.

It is an amenable number.

320023113331021 is a deficient number, since it is larger than the sum of its proper divisors (1).

320023113331021 is an equidigital number, since it uses as much as digits as its factorization.

320023113331021 is an evil number, because the sum of its binary digits is even.

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

Adding to 320023113331021 its reverse (120133311320023), we get a palindrome (440156424651044).

The spelling of 320023113331021 in words is "three hundred twenty trillion, twenty-three billion, one hundred thirteen million, three hundred thirty-one thousand, twenty-one".