220222200221 has 4 divisors (see below), whose sum is σ = 220231381500. Its totient is φ = 220213018944.

The previous prime is 220222200181. The next prime is 220222200251. The reversal of 220222200221 is 122002222022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122002222022 = 2 ⋅61001111011.

It can be written as a sum of positive squares in 2 ways, for example, as 111856802500 + 108365397721 = 334450^2 + 329189^2 .

It is a cyclic number.

It is not a de Polignac number, because 220222200221 - 2⁶ = 220222200157 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 220222200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222200251) 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 3 ways as a sum of consecutive naturals, for example, 4554566 + ... + 4602663.

It is an arithmetic number, because the mean of its divisors is an integer number (55057845375).

Almost surely, 2^220222200221 is an apocalyptic number.

It is an amenable number.

220222200221 is a deficient number, since it is larger than the sum of its proper divisors (9181279).

220222200221 is an equidigital number, since it uses as much as digits as its factorization.

220222200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9181278.

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

Adding to 220222200221 its reverse (122002222022), we get a palindrome (342224422243).

The spelling of 220222200221 in words is "two hundred twenty billion, two hundred twenty-two million, two hundred thousand, two hundred twenty-one".