13131130321 has 4 divisors (see below), whose sum is σ = 13143769600. Its totient is φ = 13118491044.

The previous prime is 13131130301. The next prime is 13131130343. The reversal of 13131130321 is 12303113131.

13131130321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 12303113131 = 64661 ⋅190271.

It is a cyclic number.

It is not a de Polignac number, because 13131130321 - 2¹⁷ = 13130999249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13131130301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6318081 + ... + 6320158.

It is an arithmetic number, because the mean of its divisors is an integer number (3285942400).

Almost surely, 2^13131130321 is an apocalyptic number.

It is an amenable number.

13131130321 is a deficient number, since it is larger than the sum of its proper divisors (12639279).

13131130321 is a wasteful number, since it uses less digits than its factorization.

13131130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12639278.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 13131130321 its reverse (12303113131), we get a palindrome (25434243452).

The spelling of 13131130321 in words is "thirteen billion, one hundred thirty-one million, one hundred thirty thousand, three hundred twenty-one".