220022221 has 4 divisors (see below), whose sum is σ = 227119744. Its totient is φ = 212924700.

The previous prime is 220022207. The next prime is 220022233. The reversal of 220022221 is 122220022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220022221 - 2¹¹ = 220020173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220022291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548715 + ... + 3548776.

It is an arithmetic number, because the mean of its divisors is an integer number (56779936).

Almost surely, 2^220022221 is an apocalyptic number.

It is an amenable number.

220022221 is a deficient number, since it is larger than the sum of its proper divisors (7097523).

220022221 is an equidigital number, since it uses as much as digits as its factorization.

220022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7097522.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 220022221 is about 14833.1460250346. The cubic root of 220022221 is about 603.7013978397.

Adding to 220022221 its reverse (122220022), we get a palindrome (342242243).

The spelling of 220022221 in words is "two hundred twenty million, twenty-two thousand, two hundred twenty-one".