13015411421 has 4 divisors (see below), whose sum is σ = 13027148700. Its totient is φ = 13003674144.

The previous prime is 13015411417. The next prime is 13015411427. The reversal of 13015411421 is 12411451031.

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 107952100 + 12907459321 = 10390^2 + 113611^2 .

It is a cyclic number.

It is not a de Polignac number, because 13015411421 - 2² = 13015411417 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 (13015411427) 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, 5866976 + ... + 5869193.

It is an arithmetic number, because the mean of its divisors is an integer number (3256787175).

Almost surely, 2^13015411421 is an apocalyptic number.

It is an amenable number.

13015411421 is a deficient number, since it is larger than the sum of its proper divisors (11737279).

13015411421 is a wasteful number, since it uses less digits than its factorization.

13015411421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11737278.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 13015411421 its reverse (12411451031), we get a palindrome (25426862452).

The spelling of 13015411421 in words is "thirteen billion, fifteen million, four hundred eleven thousand, four hundred twenty-one".