1320231331013 has 16 divisors (see below), whose sum is σ = 1611953425920. Its totient is φ = 1056066531696.

The previous prime is 1320231331007. The next prime is 1320231331109. The reversal of 1320231331013 is 3101331320231.

It is a cyclic number.

It is not a de Polignac number, because 1320231331013 - 2⁴ = 1320231330997 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 1320231331013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320231331213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74069831 + ... + 74087652.

It is an arithmetic number, because the mean of its divisors is an integer number (100747089120).

Almost surely, 2^{1320231331013} is an apocalyptic number.

It is an amenable number.

1320231331013 is a deficient number, since it is larger than the sum of its proper divisors (291722094907).

1320231331013 is a wasteful number, since it uses less digits than its factorization.

1320231331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148157576.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1320231331013 its reverse (3101331320231), we get a palindrome (4421562651244).

The spelling of 1320231331013 in words is "one trillion, three hundred twenty billion, two hundred thirty-one million, three hundred thirty-one thousand, thirteen".