220443121 has 8 divisors (see below), whose sum is σ = 223292160. Its totient is φ = 217602528.

The previous prime is 220443049. The next prime is 220443163. The reversal of 220443121 is 121344022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220443121 - 2¹⁹ = 219918833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220443191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63000 + ... + 66406.

It is an arithmetic number, because the mean of its divisors is an integer number (27911520).

Almost surely, 2^220443121 is an apocalyptic number.

It is an amenable number.

220443121 is a deficient number, since it is larger than the sum of its proper divisors (2849039).

220443121 is an equidigital number, since it uses as much as digits as its factorization.

220443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 220443121 is about 14847.3270658392. The cubic root of 220443121 is about 604.0861105903.

Adding to 220443121 its reverse (121344022), we get a palindrome (341787143).

Subtracting from 220443121 its reverse (121344022), we obtain a palindrome (99099099).

The spelling of 220443121 in words is "two hundred twenty million, four hundred forty-three thousand, one hundred twenty-one".