13513211421 has 4 divisors (see below), whose sum is σ = 18017615232. Its totient is φ = 9008807612.

The previous prime is 13513211377. The next prime is 13513211449. The reversal of 13513211421 is 12411231531.

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.

It is a cyclic number.

It is not a de Polignac number, because 13513211421 - 2²⁶ = 13446102557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13513211391 and 13513211400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513210421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252201901 + ... + 2252201906.

It is an arithmetic number, because the mean of its divisors is an integer number (4504403808).

Almost surely, 2^13513211421 is an apocalyptic number.

It is an amenable number.

13513211421 is a deficient number, since it is larger than the sum of its proper divisors (4504403811).

13513211421 is an equidigital number, since it uses as much as digits as its factorization.

13513211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504403810.

The product of its digits is 720, while the sum is 24.

Adding to 13513211421 its reverse (12411231531), we get a palindrome (25924442952).

The spelling of 13513211421 in words is "thirteen billion, five hundred thirteen million, two hundred eleven thousand, four hundred twenty-one".