12100111999 has 4 divisors (see below), whose sum is σ = 12104083600. Its totient is φ = 12096140400.

The previous prime is 12100111973. The next prime is 12100112027. The reversal of 12100111999 is 99911100121.

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 12100111999 - 2¹⁷ = 12099980927 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 (12100111939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1981227 + ... + 1987324.

It is an arithmetic number, because the mean of its divisors is an integer number (3026020900).

Almost surely, 2^12100111999 is an apocalyptic number.

12100111999 is a deficient number, since it is larger than the sum of its proper divisors (3971601).

12100111999 is an equidigital number, since it uses as much as digits as its factorization.

12100111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971600.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 12100111999 in words is "twelve billion, one hundred million, one hundred eleven thousand, nine hundred ninety-nine".