4222112221 has 2 divisors, whose sum is σ = 4222112222. Its totient is φ = 4222112220.

The previous prime is 4222112171. The next prime is 4222112273. The reversal of 4222112221 is 1222112224.

4222112221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3845364121 + 376748100 = 62011^2 + 19410^2 .

It is a cyclic number.

It is not a de Polignac number, because 4222112221 - 2³¹ = 2074628573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4222112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111056110 + 2111056111.

It is an arithmetic number, because the mean of its divisors is an integer number (2111056111).

Almost surely, 2^4222112221 is an apocalyptic number.

It is an amenable number.

4222112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4222112221 is an equidigital number, since it uses as much as digits as its factorization.

4222112221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256, while the sum is 19.

The square root of 4222112221 is about 64977.7825183347. The cubic root of 4222112221 is about 1616.2551589801.

Adding to 4222112221 its reverse (1222112224), we get a palindrome (5444224445).

The spelling of 4222112221 in words is "four billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".