12110111999 has 4 divisors (see below), whose sum is σ = 12230014200. Its totient is φ = 11990209800.

The previous prime is 12110111977. The next prime is 12110112011. The reversal of 12110111999 is 99911101121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12110111999 - 2⁸ = 12110111743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110111399) 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, 59950949 + ... + 59951150.

It is an arithmetic number, because the mean of its divisors is an integer number (3057503550).

Almost surely, 2^12110111999 is an apocalyptic number.

12110111999 is a deficient number, since it is larger than the sum of its proper divisors (119902201).

12110111999 is a wasteful number, since it uses less digits than its factorization.

12110111999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119902200.

The product of its (nonzero) digits is 1458, while the sum is 35.

The spelling of 12110111999 in words is "twelve billion, one hundred ten million, one hundred eleven thousand, nine hundred ninety-nine".