21112000209999 has 24 divisors (see below), whose sum is σ = 30592758523392. Its totient is φ = 14029642245120.

The previous prime is 21112000209941. The next prime is 21112000210013. The reversal of 21112000209999 is 99990200021112.

It is not a de Polignac number, because 21112000209999 - 2²⁸ = 21111731774543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112000207999) 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, 4044979 + ... + 7654139.

It is an arithmetic number, because the mean of its divisors is an integer number (1274698271808).

Almost surely, 2^{21112000209999} is an apocalyptic number.

21112000209999 is a deficient number, since it is larger than the sum of its proper divisors (9480758313393).

21112000209999 is a wasteful number, since it uses less digits than its factorization.

21112000209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611247 (or 3611244 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 21112000209999 in words is "twenty-one trillion, one hundred twelve billion, two hundred nine thousand, nine hundred ninety-nine".