320013013121 has 4 divisors (see below), whose sum is σ = 320884983552. Its totient is φ = 319141042692.

The previous prime is 320013013063. The next prime is 320013013129. The reversal of 320013013121 is 121310310023.

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: 121310310023 = 7 ⋅17330044289.

It is a cyclic number.

It is not a de Polignac number, because 320013013121 - 2⁶ = 320013013057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320013013121.

It is not an unprimeable number, because it can be changed into a prime (320013013129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435984665 + ... + 435985398.

It is an arithmetic number, because the mean of its divisors is an integer number (80221245888).

Almost surely, 2^320013013121 is an apocalyptic number.

It is an amenable number.

320013013121 is a deficient number, since it is larger than the sum of its proper divisors (871970431).

320013013121 is an equidigital number, since it uses as much as digits as its factorization.

320013013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871970430.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 320013013121 its reverse (121310310023), we get a palindrome (441323323144).

The spelling of 320013013121 in words is "three hundred twenty billion, thirteen million, thirteen thousand, one hundred twenty-one".