320013112021 has 4 divisors (see below), whose sum is σ = 320259088044. Its totient is φ = 319767136000.

The previous prime is 320013111961. The next prime is 320013112033. The reversal of 320013112021 is 120211310023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1675674225 + 318337437796 = 40935^2 + 564214^2 .

It is a cyclic number.

It is not a de Polignac number, because 320013112021 - 2²³ = 320004723413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320013111986 and 320013112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320014112021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122986060 + ... + 122988661.

It is an arithmetic number, because the mean of its divisors is an integer number (80064772011).

Almost surely, 2^320013112021 is an apocalyptic number.

It is an amenable number.

320013112021 is a deficient number, since it is larger than the sum of its proper divisors (245976023).

320013112021 is a wasteful number, since it uses less digits than its factorization.

320013112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245976022.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 320013112021 its reverse (120211310023), we get a palindrome (440224422044).

The spelling of 320013112021 in words is "three hundred twenty billion, thirteen million, one hundred twelve thousand, twenty-one".