12521004503351 has 4 divisors (see below), whose sum is σ = 12561264968304. Its totient is φ = 12480744038400.

The previous prime is 12521004503281. The next prime is 12521004503353. The reversal of 12521004503351 is 15330540012521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12521004503351 - 2¹⁰ = 12521004502327 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 (12521004503353) 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, 20130232010 + ... + 20130232631.

It is an arithmetic number, because the mean of its divisors is an integer number (3140316242076).

Almost surely, 2^{12521004503351} is an apocalyptic number.

12521004503351 is a deficient number, since it is larger than the sum of its proper divisors (40260464953).

12521004503351 is an equidigital number, since it uses as much as digits as its factorization.

12521004503351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40260464952.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 12521004503351 its reverse (15330540012521), we get a palindrome (27851544515872).

The spelling of 12521004503351 in words is "twelve trillion, five hundred twenty-one billion, four million, five hundred three thousand, three hundred fifty-one".