12111000021999 has 24 divisors (see below), whose sum is σ = 17921582510832. Its totient is φ = 7876527684480.

The previous prime is 12111000021947. The next prime is 12111000022049. The reversal of 12111000021999 is 99912000011121.

It is not a de Polignac number, because 12111000021999 - 2⁷ = 12111000021871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111000001999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4233484 + ... + 6491870.

It is an arithmetic number, because the mean of its divisors is an integer number (746732604618).

Almost surely, 2^{12111000021999} is an apocalyptic number.

12111000021999 is a deficient number, since it is larger than the sum of its proper divisors (5810582488833).

12111000021999 is a wasteful number, since it uses less digits than its factorization.

12111000021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272967 (or 2272964 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 12111000021999 in words is "twelve trillion, one hundred eleven billion, twenty-one thousand, nine hundred ninety-nine".