13121032313 has 4 divisors (see below), whose sum is σ = 13136898960. Its totient is φ = 13105165668.

The previous prime is 13121032277. The next prime is 13121032319. The reversal of 13121032313 is 31323012131.

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: 31323012131 = 66509 ⋅470959.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121032313 is a prime.

It is a super-2 number, since 2×13121032313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121032319) 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, 7932083 + ... + 7933736.

It is an arithmetic number, because the mean of its divisors is an integer number (3284224740).

Almost surely, 2^13121032313 is an apocalyptic number.

It is an amenable number.

13121032313 is a deficient number, since it is larger than the sum of its proper divisors (15866647).

13121032313 is an equidigital number, since it uses as much as digits as its factorization.

13121032313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866646.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13121032313 its reverse (31323012131), we get a palindrome (44444044444).

The spelling of 13121032313 in words is "thirteen billion, one hundred twenty-one million, thirty-two thousand, three hundred thirteen".