320012310303021 has 32 divisors (see below), whose sum is σ = 514556747182080. Its totient is φ = 172948239978624.

The previous prime is 320012310303013. The next prime is 320012310303047. The reversal of 320012310303021 is 120303013210023.

It is not a de Polignac number, because 320012310303021 - 2³ = 320012310303013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320012310303001) 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 31 ways as a sum of consecutive naturals, for example, 3722155705 + ... + 3722241678.

It is an arithmetic number, because the mean of its divisors is an integer number (16079898349440).

Almost surely, 2^{320012310303021} is an apocalyptic number.

It is an amenable number.

320012310303021 is a deficient number, since it is larger than the sum of its proper divisors (194544436879059).

320012310303021 is a wasteful number, since it uses less digits than its factorization.

320012310303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7444397505.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 320012310303021 its reverse (120303013210023), we get a palindrome (440315323513044).

The spelling of 320012310303021 in words is "three hundred twenty trillion, twelve billion, three hundred ten million, three hundred three thousand, twenty-one".