222020200020221 has 4 divisors (see below), whose sum is σ = 222038138159772. Its totient is φ = 222002261880672.

The previous prime is 222020200020209. The next prime is 222020200020253. The reversal of 222020200020221 is 122020002020222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34657487217721 + 187362712802500 = 5887061^2 + 13688050^2 .

It is a cyclic number.

It is not a de Polignac number, because 222020200020221 - 2¹⁰ = 222020200019197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222020200020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222020200020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8969051210 + ... + 8969075963.

It is an arithmetic number, because the mean of its divisors is an integer number (55509534539943).

Almost surely, 2^{222020200020221} is an apocalyptic number.

It is an amenable number.

222020200020221 is a deficient number, since it is larger than the sum of its proper divisors (17938139551).

222020200020221 is a wasteful number, since it uses less digits than its factorization.

222020200020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938139550.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 222020200020221 its reverse (122020002020222), we get a palindrome (344040202040443).

The spelling of 222020200020221 in words is "two hundred twenty-two trillion, twenty billion, two hundred million, twenty thousand, two hundred twenty-one".