320113240021 has 16 divisors (see below), whose sum is σ = 325357596720. Its totient is φ = 314893025280.

The previous prime is 320113239983. The next prime is 320113240033. The reversal of 320113240021 is 120042311023.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 65426477796 + 254686762225 = 255786^2 + 504665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320113240021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320113240061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105264261 + ... + 105267301.

It is an arithmetic number, because the mean of its divisors is an integer number (20334849795).

Almost surely, 2^320113240021 is an apocalyptic number.

It is an amenable number.

320113240021 is a deficient number, since it is larger than the sum of its proper divisors (5244356699).

320113240021 is a wasteful number, since it uses less digits than its factorization.

320113240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 320113240021 its reverse (120042311023), we get a palindrome (440155551044).

The spelling of 320113240021 in words is "three hundred twenty billion, one hundred thirteen million, two hundred forty thousand, twenty-one".