2212022221 has 2 divisors, whose sum is σ = 2212022222. Its totient is φ = 2212022220.

The previous prime is 2212022213. The next prime is 2212022233. The reversal of 2212022221 is 1222202122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2210034121 + 1988100 = 47011^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212022221 - 2³ = 2212022213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212022195 and 2212022204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212022251) 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 as a sum of consecutive naturals, namely, 1106011110 + 1106011111.

It is an arithmetic number, because the mean of its divisors is an integer number (1106011111).

Almost surely, 2^2212022221 is an apocalyptic number.

It is an amenable number.

2212022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212022221 is an equidigital number, since it uses as much as digits as its factorization.

2212022221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2212022221 is about 47032.1402978857. The cubic root of 2212022221 is about 1302.9562350678.

Adding to 2212022221 its reverse (1222202122), we get a palindrome (3434224343).

The spelling of 2212022221 in words is "two billion, two hundred twelve million, twenty-two thousand, two hundred twenty-one".