20000220121999 has 16 divisors (see below), whose sum is σ = 22487727326400. Its totient is φ = 17649185849856.

The previous prime is 20000220121991. The next prime is 20000220122021. The reversal of 20000220121999 is 99912102200002.

It is a cyclic number.

It is not a de Polignac number, because 20000220121999 - 2³ = 20000220121991 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 (20000220121991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18159994 + ... + 19229815.

It is an arithmetic number, because the mean of its divisors is an integer number (1405482957900).

Almost surely, 2^{20000220121999} is an apocalyptic number.

20000220121999 is a deficient number, since it is larger than the sum of its proper divisors (2487507204401).

20000220121999 is a wasteful number, since it uses less digits than its factorization.

20000220121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37391634.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 20000220121999 in words is "twenty trillion, two hundred twenty million, one hundred twenty-one thousand, nine hundred ninety-nine".