12501517521 has 8 divisors (see below), whose sum is σ = 16855979040. Its totient is φ = 8240700512.

The previous prime is 12501517507. The next prime is 12501517573. The reversal of 12501517521 is 12571510521.

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 12501517521 - 2¹⁰ = 12501516497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12501517121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23410815 + ... + 23411348.

It is an arithmetic number, because the mean of its divisors is an integer number (2106997380).

Almost surely, 2^12501517521 is an apocalyptic number.

It is an amenable number.

12501517521 is a deficient number, since it is larger than the sum of its proper divisors (4354461519).

12501517521 is an equidigital number, since it uses as much as digits as its factorization.

12501517521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46822255.

The product of its (nonzero) digits is 3500, while the sum is 30.

The spelling of 12501517521 in words is "twelve billion, five hundred one million, five hundred seventeen thousand, five hundred twenty-one".