12501161521 has 16 divisors (see below), whose sum is σ = 12735213120. Its totient is φ = 12269537280.

The previous prime is 12501161513. The next prime is 12501161527. The reversal of 12501161521 is 12516110521.

It is a cyclic number.

It is not a de Polignac number, because 12501161521 - 2³ = 12501161513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12501161527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10271505 + ... + 10272721.

It is an arithmetic number, because the mean of its divisors is an integer number (795950820).

Almost surely, 2^12501161521 is an apocalyptic number.

It is an amenable number.

12501161521 is a deficient number, since it is larger than the sum of its proper divisors (234051599).

12501161521 is a wasteful number, since it uses less digits than its factorization.

12501161521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064.

The product of its (nonzero) digits is 600, while the sum is 25.

The spelling of 12501161521 in words is "twelve billion, five hundred one million, one hundred sixty-one thousand, five hundred twenty-one".