12521606353 has 4 divisors (see below), whose sum is σ = 12827011428. Its totient is φ = 12216201280.

The previous prime is 12521606333. The next prime is 12521606371. The reversal of 12521606353 is 35360612521.

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 1159538704 + 11362067649 = 34052^2 + 106593^2 .

It is a cyclic number.

It is not a de Polignac number, because 12521606353 - 2⁹ = 12521605841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12521606303) 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, 152702476 + ... + 152702557.

It is an arithmetic number, because the mean of its divisors is an integer number (3206752857).

Almost surely, 2^12521606353 is an apocalyptic number.

It is an amenable number.

12521606353 is a deficient number, since it is larger than the sum of its proper divisors (305405075).

12521606353 is an equidigital number, since it uses as much as digits as its factorization.

12521606353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305405074.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 12521606353 in words is "twelve billion, five hundred twenty-one million, six hundred six thousand, three hundred fifty-three".