2101222021999 has 4 divisors (see below), whose sum is σ = 2101373170336. Its totient is φ = 2101070873664.

The previous prime is 2101222021973. The next prime is 2101222022033. The reversal of 2101222021999 is 9991202221012.

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 2101222021999 - 2²⁷ = 2101087804271 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 (2101222021499) 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, 75553314 + ... + 75581119.

It is an arithmetic number, because the mean of its divisors is an integer number (525343292584).

Almost surely, 2^{2101222021999} is an apocalyptic number.

2101222021999 is a deficient number, since it is larger than the sum of its proper divisors (151148337).

2101222021999 is a wasteful number, since it uses less digits than its factorization.

2101222021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151148336.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 2101222021999 in words is "two trillion, one hundred one billion, two hundred twenty-two million, twenty-one thousand, nine hundred ninety-nine".