2120011021999 has 16 divisors (see below), whose sum is σ = 2319960835584. Its totient is φ = 1925440927200.

The previous prime is 2120011021991. The next prime is 2120011022027. The reversal of 2120011021999 is 9991201100212.

It is a cyclic number.

It is not a de Polignac number, because 2120011021999 - 2³ = 2120011021991 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 (2120011021991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885779 + ... + 2792164.

It is an arithmetic number, because the mean of its divisors is an integer number (144997552224).

Almost surely, 2^{2120011021999} is an apocalyptic number.

2120011021999 is a deficient number, since it is larger than the sum of its proper divisors (199949813585).

2120011021999 is a wasteful number, since it uses less digits than its factorization.

2120011021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678518.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 2120011021999 in words is "two trillion, one hundred twenty billion, eleven million, twenty-one thousand, nine hundred ninety-nine".