12530231521 has 8 divisors (see below), whose sum is σ = 12991582080. Its totient is φ = 12070832592.

The previous prime is 12530231513. The next prime is 12530231551. The reversal of 12530231521 is 12513203521.

12530231521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12530231521 - 2³ = 12530231513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12530231501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 474825 + ... + 500518.

It is an arithmetic number, because the mean of its divisors is an integer number (1623947760).

Almost surely, 2^12530231521 is an apocalyptic number.

It is an amenable number.

12530231521 is a deficient number, since it is larger than the sum of its proper divisors (461350559).

12530231521 is an equidigital number, since it uses as much as digits as its factorization.

12530231521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975815.

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 12530231521 in words is "twelve billion, five hundred thirty million, two hundred thirty-one thousand, five hundred twenty-one".