12181912 has 16 divisors (see below), whose sum is σ = 22926600. Its totient is φ = 6068160.

The previous prime is 12181909. The next prime is 12181919. The reversal of 12181912 is 21918121.

12181912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462 + ... + 4957.

Almost surely, 2^12181912 is an apocalyptic number.

It is an amenable number.

12181912 is a deficient number, since it is larger than the sum of its proper divisors (10744688).

12181912 is a wasteful number, since it uses less digits than its factorization.

12181912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5706 (or 5702 counting only the distinct ones).

The product of its digits is 288, while the sum is 25.

The square root of 12181912 is about 3490.2595891996. The cubic root of 12181912 is about 230.0939250916.

The spelling of 12181912 in words is "twelve million, one hundred eighty-one thousand, nine hundred twelve".