12181542025 has 12 divisors (see below), whose sum is σ = 15456395152. Its totient is φ = 9518599440.

The previous prime is 12181542013. The next prime is 12181542031. The reversal of 12181542025 is 52024518121.

It is not a de Polignac number, because 12181542025 - 2⁹ = 12181541513 is a prime.

It is a super-2 number, since 2×12181542025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5664759 + ... + 5666908.

Almost surely, 2^12181542025 is an apocalyptic number.

It is an amenable number.

12181542025 is a deficient number, since it is larger than the sum of its proper divisors (3274853127).

12181542025 is a wasteful number, since it uses less digits than its factorization.

12181542025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331720 (or 11331715 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The spelling of 12181542025 in words is "twelve billion, one hundred eighty-one million, five hundred forty-two thousand, twenty-five".