12521225315 has 8 divisors (see below), whose sum is σ = 15431564400. Its totient is φ = 9746250912.

The previous prime is 12521225293. The next prime is 12521225333. The reversal of 12521225315 is 51352212521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12521225315 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33840965 + ... + 33841334.

It is an arithmetic number, because the mean of its divisors is an integer number (1928945550).

Almost surely, 2^12521225315 is an apocalyptic number.

12521225315 is a deficient number, since it is larger than the sum of its proper divisors (2910339085).

12521225315 is an equidigital number, since it uses as much as digits as its factorization.

12521225315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67682341.

The product of its digits is 6000, while the sum is 29.

Adding to 12521225315 its reverse (51352212521), we get a palindrome (63873437836).

The spelling of 12521225315 in words is "twelve billion, five hundred twenty-one million, two hundred twenty-five thousand, three hundred fifteen".