220220202221 has 12 divisors (see below), whose sum is σ = 239918223744. Its totient is φ = 201899665800.

The previous prime is 220220202157. The next prime is 220220202247. The reversal of 220220202221 is 122202022022.

It is not a de Polignac number, because 220220202221 - 2⁶ = 220220202157 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 220220202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220202271) 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, 9827975 + ... + 9850356.

It is an arithmetic number, because the mean of its divisors is an integer number (19993185312).

Almost surely, 2^220220202221 is an apocalyptic number.

It is an amenable number.

220220202221 is a deficient number, since it is larger than the sum of its proper divisors (19698021523).

220220202221 is a wasteful number, since it uses less digits than its factorization.

220220202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19678400 (or 19678381 counting only the distinct ones).

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

Adding to 220220202221 its reverse (122202022022), we get a palindrome (342422224243).

The spelling of 220220202221 in words is "two hundred twenty billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".