12321120013 has 4 divisors (see below), whose sum is σ = 12333284028. Its totient is φ = 12308956000.

The previous prime is 12321120001. The next prime is 12321120017. The reversal of 12321120013 is 31002112321.

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 3410326404 + 8910793609 = 58398^2 + 94397^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321120013 - 2⁹ = 12321119501 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 (12321120017) 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, 6080488 + ... + 6082513.

It is an arithmetic number, because the mean of its divisors is an integer number (3083321007).

Almost surely, 2^12321120013 is an apocalyptic number.

It is an amenable number.

12321120013 is a deficient number, since it is larger than the sum of its proper divisors (12164015).

12321120013 is a wasteful number, since it uses less digits than its factorization.

12321120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12164014.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12321120013 its reverse (31002112321), we get a palindrome (43323232334).

The spelling of 12321120013 in words is "twelve billion, three hundred twenty-one million, one hundred twenty thousand, thirteen".