222112222002221 has 2 divisors, whose sum is σ = 222112222002222. Its totient is φ = 222112222002220.

The previous prime is 222112222002191. The next prime is 222112222002233. The reversal of 222112222002221 is 122200222211222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185943605020996 + 36168616981225 = 13636114^2 + 6014035^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112222002221 - 2⁶ = 222112222002157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222112212002221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056111001110 + 111056111001111.

It is an arithmetic number, because the mean of its divisors is an integer number (111056111001111).

Almost surely, 2^{222112222002221} is an apocalyptic number.

It is an amenable number.

222112222002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112222002221 is an equidigital number, since it uses as much as digits as its factorization.

222112222002221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222112222002221 its reverse (122200222211222), we get a palindrome (344312444213443).

The spelling of 222112222002221 in words is "two hundred twenty-two trillion, one hundred twelve billion, two hundred twenty-two million, two thousand, two hundred twenty-one".