13104318721 has 8 divisors (see below), whose sum is σ = 14129798760. Its totient is φ = 12081332352.

The previous prime is 13104318707. The next prime is 13104318727. The reversal of 13104318721 is 12781340131.

It can be written as a sum of positive squares in 4 ways, for example, as 1454354496 + 11649964225 = 38136^2 + 107935^2 .

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 13104318721 - 2⁷ = 13104318593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13104318727) 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, 612490 + ... + 633523.

It is an arithmetic number, because the mean of its divisors is an integer number (1766224845).

Almost surely, 2^13104318721 is an apocalyptic number.

It is an amenable number.

13104318721 is a deficient number, since it is larger than the sum of its proper divisors (1025480039).

13104318721 is a wasteful number, since it uses less digits than its factorization.

13104318721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246835.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 13104318721 its reverse (12781340131), we get a palindrome (25885658852).

The spelling of 13104318721 in words is "thirteen billion, one hundred four million, three hundred eighteen thousand, seven hundred twenty-one".