2111102021999 has 4 divisors (see below), whose sum is σ = 2112314603880. Its totient is φ = 2109889440120.

The previous prime is 2111102021993. The next prime is 2111102022089. The reversal of 2111102021999 is 9991202011112.

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 2111102021999 - 2²⁴ = 2111085244783 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 (2111102021993) 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, 606288329 + ... + 606291810.

It is an arithmetic number, because the mean of its divisors is an integer number (528078650970).

Almost surely, 2^{2111102021999} is an apocalyptic number.

2111102021999 is a deficient number, since it is larger than the sum of its proper divisors (1212581881).

2111102021999 is a wasteful number, since it uses less digits than its factorization.

2111102021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212581880.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 2111102021999 in words is "two trillion, one hundred eleven billion, one hundred two million, twenty-one thousand, nine hundred ninety-nine".