220232243221 has 4 divisors (see below), whose sum is σ = 220238767744. Its totient is φ = 220225718700.

The previous prime is 220232243213. The next prime is 220232243249. The reversal of 220232243221 is 122342232022.

220232243221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220232243221 - 2³ = 220232243213 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 (220232243261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3211365 + ... + 3279226.

It is an arithmetic number, because the mean of its divisors is an integer number (55059691936).

Almost surely, 2^220232243221 is an apocalyptic number.

It is an amenable number.

220232243221 is a deficient number, since it is larger than the sum of its proper divisors (6524523).

220232243221 is an equidigital number, since it uses as much as digits as its factorization.

220232243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524522.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 220232243221 its reverse (122342232022), we get a palindrome (342574475243).

The spelling of 220232243221 in words is "two hundred twenty billion, two hundred thirty-two million, two hundred forty-three thousand, two hundred twenty-one".