220232221 has 12 divisors (see below), whose sum is σ = 243636316. Its totient is φ = 198918720.

The previous prime is 220232219. The next prime is 220232227. The reversal of 220232221 is 122232022.

It can be written as a sum of positive squares in 2 ways, for example, as 147744025 + 72488196 = 12155^2 + 8514^2 .

It is not a de Polignac number, because 220232221 - 2¹ = 220232219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220232195 and 220232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220232227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13201 + ... + 24793.

Almost surely, 2^220232221 is an apocalyptic number.

It is an amenable number.

220232221 is a deficient number, since it is larger than the sum of its proper divisors (23404095).

220232221 is a wasteful number, since it uses less digits than its factorization.

220232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11772 (or 11761 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 220232221 is about 14840.2230778381. The cubic root of 220232221 is about 603.8934041746.

Adding to 220232221 its reverse (122232022), we get a palindrome (342464243).

The spelling of 220232221 in words is "two hundred twenty million, two hundred thirty-two thousand, two hundred twenty-one".