220021012001999 has 4 divisors (see below), whose sum is σ = 236945705232936. Its totient is φ = 203096318771064.

The previous prime is 220021012001939. The next prime is 220021012002017. The reversal of 220021012001999 is 999100210120022.

It is a happy number.

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 220021012001999 - 2¹⁶ = 220021011936463 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 (220021012001939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8462346615449 + ... + 8462346615474.

It is an arithmetic number, because the mean of its divisors is an integer number (59236426308234).

Almost surely, 2^{220021012001999} is an apocalyptic number.

220021012001999 is a deficient number, since it is larger than the sum of its proper divisors (16924693230937).

220021012001999 is a wasteful number, since it uses less digits than its factorization.

220021012001999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16924693230936.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 220021012001999 in words is "two hundred twenty trillion, twenty-one billion, twelve million, one thousand, nine hundred ninety-nine".