12111819 has 16 divisors (see below), whose sum is σ = 16568064. Its totient is φ = 7868000.

The previous prime is 12111817. The next prime is 12111829. The reversal of 12111819 is 91811121.

12111819 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12111819 - 2¹ = 12111817 is a prime.

It is a super-2 number, since 2×12111819² = 293392318977522, which contains 22 as substring.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21232 + ... + 21794.

It is an arithmetic number, because the mean of its divisors is an integer number (1035504).

Almost surely, 2^12111819 is an apocalyptic number.

12111819 is a deficient number, since it is larger than the sum of its proper divisors (4456245).

12111819 is a wasteful number, since it uses less digits than its factorization.

12111819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738.

The product of its digits is 144, while the sum is 24.

The square root of 12111819 is about 3480.2038733385. The cubic root of 12111819 is about 229.6517666564.

The spelling of 12111819 in words is "twelve million, one hundred eleven thousand, eight hundred nineteen".