200021222021221 has 12 divisors (see below), whose sum is σ = 211125747150252. Its totient is φ = 189473128369344.

The previous prime is 200021222021171. The next prime is 200021222021233. The reversal of 200021222021221 is 122120222120002.

It can be written as a sum of positive squares in 2 ways, for example, as 76364353368900 + 123656868652321 = 8738670^2 + 11120111^2 .

It is not a de Polignac number, because 200021222021221 - 2¹⁵ = 200021221988453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021222021521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26889976 + ... + 33512881.

It is an arithmetic number, because the mean of its divisors is an integer number (17593812262521).

Almost surely, 2^{200021222021221} is an apocalyptic number.

It is an amenable number.

200021222021221 is a deficient number, since it is larger than the sum of its proper divisors (11104525129031).

200021222021221 is an equidigital number, since it uses as much as digits as its factorization.

200021222021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60412068 (or 60412049 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 200021222021221 its reverse (122120222120002), we get a palindrome (322141444141223).

The spelling of 200021222021221 in words is "two hundred trillion, twenty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".