200021121999 has 12 divisors (see below), whose sum is σ = 289027359816. Its totient is φ = 133297586352.

The previous prime is 200021121997. The next prime is 200021122019. The reversal of 200021121999 is 999121120002.

200021121999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 200021121999 - 2¹ = 200021121997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021121997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4126929 + ... + 4175114.

It is an arithmetic number, because the mean of its divisors is an integer number (24085613318).

Almost surely, 2^200021121999 is an apocalyptic number.

200021121999 is a deficient number, since it is larger than the sum of its proper divisors (89006237817).

200021121999 is a wasteful number, since it uses less digits than its factorization.

200021121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304726 (or 8304723 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 200021121999 in words is "two hundred billion, twenty-one million, one hundred twenty-one thousand, nine hundred ninety-nine".