220012211221 has 32 divisors (see below), whose sum is σ = 248561233920. Its totient is φ = 193042699200.

The previous prime is 220012211207. The next prime is 220012211227. The reversal of 220012211221 is 122112210022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220012211221 - 2⁵ = 220012211189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220012211195 and 220012211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012211227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8627736 + ... + 8653198.

It is an arithmetic number, because the mean of its divisors is an integer number (7767538560).

Almost surely, 2^220012211221 is an apocalyptic number.

It is an amenable number.

220012211221 is a deficient number, since it is larger than the sum of its proper divisors (28549022699).

220012211221 is a wasteful number, since it uses less digits than its factorization.

220012211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25777.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220012211221 its reverse (122112210022), we get a palindrome (342124421243).

The spelling of 220012211221 in words is "two hundred twenty billion, twelve million, two hundred eleven thousand, two hundred twenty-one".