12111992 has 32 divisors (see below), whose sum is σ = 23500800. Its totient is φ = 5849184.

The previous prime is 12111991. The next prime is 12111997. The reversal of 12111992 is 29911121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31433 + ... + 31815.

It is an arithmetic number, because the mean of its divisors is an integer number (734400).

Almost surely, 2^12111992 is an apocalyptic number.

It is an amenable number.

12111992 is a deficient number, since it is larger than the sum of its proper divisors (11388808).

12111992 is a wasteful number, since it uses less digits than its factorization.

12111992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 511 counting only the distinct ones).

The product of its digits is 324, while the sum is 26.

The square root of 12111992 is about 3480.2287281154. The cubic root of 12111992 is about 229.6528600668.

The spelling of 12111992 in words is "twelve million, one hundred eleven thousand, nine hundred ninety-two".