220012221 has 16 divisors (see below), whose sum is σ = 344635200. Its totient is φ = 123083520.

The previous prime is 220012207. The next prime is 220012297. The reversal of 220012221 is 122210022.

It is not a de Polignac number, because 220012221 - 2⁵ = 220012189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220012197 and 220012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255996 + ... + 256853.

It is an arithmetic number, because the mean of its divisors is an integer number (21539700).

Almost surely, 2^220012221 is an apocalyptic number.

It is an amenable number.

220012221 is a deficient number, since it is larger than the sum of its proper divisors (124622979).

220012221 is a wasteful number, since it uses less digits than its factorization.

220012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512876.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 220012221 is about 14832.8089382962. The cubic root of 220012221 is about 603.6922516340.

Adding to 220012221 its reverse (122210022), we get a palindrome (342222243).

The spelling of 220012221 in words is "two hundred twenty million, twelve thousand, two hundred twenty-one".