13120004321 has 4 divisors (see below), whose sum is σ = 13187983812. Its totient is φ = 13052024832.

The previous prime is 13120004311. The next prime is 13120004323. The reversal of 13120004321 is 12340002131.

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 2395123600 + 10724880721 = 48940^2 + 103561^2 .

It is a cyclic number.

It is not a de Polignac number, because 13120004321 - 2²² = 13115810017 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 13120004321.

It is not an unprimeable number, because it can be changed into a prime (13120004323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33989456 + ... + 33989841.

It is an arithmetic number, because the mean of its divisors is an integer number (3296995953).

Almost surely, 2^13120004321 is an apocalyptic number.

It is an amenable number.

13120004321 is a deficient number, since it is larger than the sum of its proper divisors (67979491).

13120004321 is an equidigital number, since it uses as much as digits as its factorization.

13120004321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67979490.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13120004321 its reverse (12340002131), we get a palindrome (25460006452).

The spelling of 13120004321 in words is "thirteen billion, one hundred twenty million, four thousand, three hundred twenty-one".