12521340425 has 24 divisors (see below), whose sum is σ = 16944144672. Its totient is φ = 9103104000.

The previous prime is 12521340407. The next prime is 12521340437. The reversal of 12521340425 is 52404312521.

12521340425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12521340425 - 2²⁴ = 12504563209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 944090 + ... + 957260.

It is an arithmetic number, because the mean of its divisors is an integer number (706006028).

Almost surely, 2^12521340425 is an apocalyptic number.

It is an amenable number.

12521340425 is a deficient number, since it is larger than the sum of its proper divisors (4422804247).

12521340425 is a wasteful number, since it uses less digits than its factorization.

12521340425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16649 (or 16644 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 12521340425 its reverse (52404312521), we get a palindrome (64925652946).

The spelling of 12521340425 in words is "twelve billion, five hundred twenty-one million, three hundred forty thousand, four hundred twenty-five".