320321013013 has 4 divisors (see below), whose sum is σ = 320322434188. Its totient is φ = 320319591840.

The previous prime is 320321012981. The next prime is 320321013043. The reversal of 320321013013 is 310310123023.

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 159954403249 + 160366609764 = 399943^2 + 400458^2 .

It is a cyclic number.

It is not a de Polignac number, because 320321013013 - 2⁵ = 320321012981 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 (320321013043) 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, 289206 + ... + 851047.

It is an arithmetic number, because the mean of its divisors is an integer number (80080608547).

Almost surely, 2^320321013013 is an apocalyptic number.

It is an amenable number.

320321013013 is a deficient number, since it is larger than the sum of its proper divisors (1421175).

320321013013 is a wasteful number, since it uses less digits than its factorization.

320321013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421174.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 320321013013 its reverse (310310123023), we get a palindrome (630631136036).

The spelling of 320321013013 in words is "three hundred twenty billion, three hundred twenty-one million, thirteen thousand, thirteen".