13512321213 has 4 divisors (see below), whose sum is σ = 18016428288. Its totient is φ = 9008214140.

The previous prime is 13512321197. The next prime is 13512321217. The reversal of 13512321213 is 31212321531.

It is a happy number.

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 13512321213 - 2⁴ = 13512321197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13512321217) 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, 2252053533 + ... + 2252053538.

It is an arithmetic number, because the mean of its divisors is an integer number (4504107072).

Almost surely, 2^13512321213 is an apocalyptic number.

It is an amenable number.

13512321213 is a deficient number, since it is larger than the sum of its proper divisors (4504107075).

13512321213 is an equidigital number, since it uses as much as digits as its factorization.

13512321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504107074.

The product of its digits is 1080, while the sum is 24.

Adding to 13512321213 its reverse (31212321531), we get a palindrome (44724642744).

The spelling of 13512321213 in words is "thirteen billion, five hundred twelve million, three hundred twenty-one thousand, two hundred thirteen".