320332013021 has 4 divisors (see below), whose sum is σ = 334259491872. Its totient is φ = 306404534172.

The previous prime is 320332012993. The next prime is 320332013041. The reversal of 320332013021 is 120310233023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120310233023 = 1039 ⋅115794257.

It is a cyclic number.

It is not a de Polignac number, because 320332013021 - 2¹⁴ = 320331996637 is a prime.

It is a super-2 number, since 2×320332013021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320332012984 and 320332013002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320332013041) 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, 6963739391 + ... + 6963739436.

It is an arithmetic number, because the mean of its divisors is an integer number (83564872968).

Almost surely, 2^320332013021 is an apocalyptic number.

It is an amenable number.

320332013021 is a deficient number, since it is larger than the sum of its proper divisors (13927478851).

320332013021 is a wasteful number, since it uses less digits than its factorization.

320332013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13927478850.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 320332013021 its reverse (120310233023), we get a palindrome (440642246044).

The spelling of 320332013021 in words is "three hundred twenty billion, three hundred thirty-two million, thirteen thousand, twenty-one".