220000200021 has 48 divisors (see below), whose sum is σ = 364446111744. Its totient is φ = 125275112352.

The previous prime is 220000200019. The next prime is 220000200023. The reversal of 220000200021 is 120002000022.

It is an interprime number because it is at equal distance from previous prime (220000200019) and next prime (220000200023).

It is not a de Polignac number, because 220000200021 - 2¹ = 220000200019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 220000199976 and 220000200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220000200023) 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 47 ways as a sum of consecutive naturals, for example, 24750840 + ... + 24759726.

It is an arithmetic number, because the mean of its divisors is an integer number (7592627328).

Almost surely, 2^220000200021 is an apocalyptic number.

220000200021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220000200021 is a deficient number, since it is larger than the sum of its proper divisors (144445911723).

220000200021 is a wasteful number, since it uses less digits than its factorization.

220000200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10230 (or 10227 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 220000200021 its reverse (120002000022), we get a palindrome (340002200043).

The spelling of 220000200021 in words is "two hundred twenty billion, two hundred thousand, twenty-one".