2111020209999 has 48 divisors (see below), whose sum is σ = 3215216209920. Its totient is φ = 1332709122240.

The previous prime is 2111020209989. The next prime is 2111020210073. The reversal of 2111020209999 is 9999020201112.

It is not a de Polignac number, because 2111020209999 - 2⁵ = 2111020209967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111020209959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83635209 + ... + 83660445.

It is an arithmetic number, because the mean of its divisors is an integer number (66983671040).

Almost surely, 2^{2111020209999} is an apocalyptic number.

2111020209999 is a deficient number, since it is larger than the sum of its proper divisors (1104195999921).

2111020209999 is a wasteful number, since it uses less digits than its factorization.

2111020209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31700 (or 31697 counting only the distinct ones).

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

The spelling of 2111020209999 in words is "two trillion, one hundred eleven billion, twenty million, two hundred nine thousand, nine hundred ninety-nine".