12507609121 has 48 divisors (see below), whose sum is σ = 15835792896. Its totient is φ = 9811221504.

The previous prime is 12507609089. The next prime is 12507609137. The reversal of 12507609121 is 12190670521.

It is not a de Polignac number, because 12507609121 - 2⁵ = 12507609089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12507609181) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6537261 + ... + 6539173.

It is an arithmetic number, because the mean of its divisors is an integer number (329912352).

Almost surely, 2^12507609121 is an apocalyptic number.

It is an amenable number.

12507609121 is a deficient number, since it is larger than the sum of its proper divisors (3328183775).

12507609121 is a wasteful number, since it uses less digits than its factorization.

12507609121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2151 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 12507609121 in words is "twelve billion, five hundred seven million, six hundred nine thousand, one hundred twenty-one".