12107721625 has 16 divisors (see below), whose sum is σ = 15115810320. Its totient is φ = 9682732800.

The previous prime is 12107721547. The next prime is 12107721631. The reversal of 12107721625 is 52612770121.

It can be written as a sum of positive squares in 8 ways, for example, as 615238416 + 11492483209 = 24804^2 + 107203^2 .

It is not a de Polignac number, because 12107721625 - 2⁷ = 12107721497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370447 + ... + 401803.

It is an arithmetic number, because the mean of its divisors is an integer number (944738145).

Almost surely, 2^12107721625 is an apocalyptic number.

It is an amenable number.

12107721625 is a deficient number, since it is larger than the sum of its proper divisors (3008088695).

12107721625 is an equidigital number, since it uses as much as digits as its factorization.

12107721625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34461 (or 34451 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 12107721625 in words is "twelve billion, one hundred seven million, seven hundred twenty-one thousand, six hundred twenty-five".