220221211 has 4 divisors (see below), whose sum is σ = 251681392. Its totient is φ = 188761032.

The previous prime is 220221193. The next prime is 220221223. The reversal of 220221211 is 112122022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220221211 - 2¹⁷ = 220090139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220221191 and 220221200.

It is not an unprimeable number, because it can be changed into a prime (220224211) 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 3 ways as a sum of consecutive naturals, for example, 15730080 + ... + 15730093.

It is an arithmetic number, because the mean of its divisors is an integer number (62920348).

Almost surely, 2^220221211 is an apocalyptic number.

220221211 is a deficient number, since it is larger than the sum of its proper divisors (31460181).

220221211 is an equidigital number, since it uses as much as digits as its factorization.

220221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31460180.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 220221211 is about 14839.8521219047. The cubic root of 220221211 is about 603.8833405893.

Adding to 220221211 its reverse (112122022), we get a palindrome (332343233).

The spelling of 220221211 in words is "two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".