13123121313 has 8 divisors (see below), whose sum is σ = 17586315648. Its totient is φ = 8704337264.

The previous prime is 13123121279. The next prime is 13123121317. The reversal of 13123121313 is 31312132131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13123121313 - 2²² = 13118927009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13123121313.

It is not an unprimeable number, because it can be changed into a prime (13123121317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11101881 + ... + 11103062.

It is an arithmetic number, because the mean of its divisors is an integer number (2198289456).

Almost surely, 2^13123121313 is an apocalyptic number.

It is an amenable number.

13123121313 is a deficient number, since it is larger than the sum of its proper divisors (4463194335).

13123121313 is a wasteful number, since it uses less digits than its factorization.

13123121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22205143.

The product of its digits is 324, while the sum is 21.

Adding to 13123121313 its reverse (31312132131), we get a palindrome (44435253444).

The spelling of 13123121313 in words is "thirteen billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred thirteen".