320023221021 has 24 divisors (see below), whose sum is σ = 528314354880. Its totient is φ = 182862778176.

The previous prime is 320023220897. The next prime is 320023221029. The reversal of 320023221021 is 120122320023.

320023221021 is a `hidden beast` number, since 3 + 200 + 232 + 210 + 21 = 666.

320023221021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 320023221021 - 2⁷ = 320023220893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320023220985 and 320023221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320023221029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1642066 + ... + 1826588.

It is an arithmetic number, because the mean of its divisors is an integer number (22013098120).

Almost surely, 2^320023221021 is an apocalyptic number.

It is an amenable number.

320023221021 is a deficient number, since it is larger than the sum of its proper divisors (208291133859).

320023221021 is a wasteful number, since it uses less digits than its factorization.

320023221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212065 (or 212062 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 320023221021 its reverse (120122320023), we get a palindrome (440145541044).

The spelling of 320023221021 in words is "three hundred twenty billion, twenty-three million, two hundred twenty-one thousand, twenty-one".