12111812 has 12 divisors (see below), whose sum is σ = 21290640. Its totient is φ = 6028776.

The previous prime is 12111811. The next prime is 12111817. The reversal of 12111812 is 21811121.

It is not an unprimeable number, because it can be changed into a prime (12111811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5762 + ... + 7577.

It is an arithmetic number, because the mean of its divisors is an integer number (1774220).

Almost surely, 2^12111812 is an apocalyptic number.

It is an amenable number.

12111812 is a deficient number, since it is larger than the sum of its proper divisors (9178828).

12111812 is a wasteful number, since it uses less digits than its factorization.

12111812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13570 (or 13568 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

The square root of 12111812 is about 3480.2028676501. The cubic root of 12111812 is about 229.6517224141.

Adding to 12111812 its reverse (21811121), we get a palindrome (33922933).

The spelling of 12111812 in words is "twelve million, one hundred eleven thousand, eight hundred twelve".