220320221 has 16 divisors (see below), whose sum is σ = 263269440. Its totient is φ = 182004480.

The previous prime is 220320203. The next prime is 220320223. The reversal of 220320221 is 122023022.

It is a cyclic number.

It is not a de Polignac number, because 220320221 - 2¹⁸ = 220058077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220320196 and 220320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220320223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14891 + ... + 25736.

It is an arithmetic number, because the mean of its divisors is an integer number (16454340).

Almost surely, 2^220320221 is an apocalyptic number.

It is an amenable number.

220320221 is a deficient number, since it is larger than the sum of its proper divisors (42949219).

220320221 is a wasteful number, since it uses less digits than its factorization.

220320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40684.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220320221 is about 14843.1876967180. The cubic root of 220320221 is about 603.9738276819.

Adding to 220320221 its reverse (122023022), we get a palindrome (342343243).

The spelling of 220320221 in words is "two hundred twenty million, three hundred twenty thousand, two hundred twenty-one".