13015130421 has 4 divisors (see below), whose sum is σ = 17353507232. Its totient is φ = 8676753612.

The previous prime is 13015130399. The next prime is 13015130441. The reversal of 13015130421 is 12403151031.

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: 12403151031 = 3 ⋅4134383677.

It is not a de Polignac number, because 13015130421 - 2⁵ = 13015130389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13015130441) 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, 2169188401 + ... + 2169188406.

It is an arithmetic number, because the mean of its divisors is an integer number (4338376808).

Almost surely, 2^13015130421 is an apocalyptic number.

It is an amenable number.

13015130421 is a deficient number, since it is larger than the sum of its proper divisors (4338376811).

13015130421 is an equidigital number, since it uses as much as digits as its factorization.

13015130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338376810.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 13015130421 its reverse (12403151031), we get a palindrome (25418281452).

The spelling of 13015130421 in words is "thirteen billion, fifteen million, one hundred thirty thousand, four hundred twenty-one".