22112211002221 has 2 divisors, whose sum is σ = 22112211002222. Its totient is φ = 22112211002220.

The previous prime is 22112211002209. The next prime is 22112211002239. The reversal of 22112211002221 is 12220011221122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11554975346121 + 10557235656100 = 3399261^2 + 3249190^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112211002221 - 2⁷ = 22112211002093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22112211002201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056105501110 + 11056105501111.

It is an arithmetic number, because the mean of its divisors is an integer number (11056105501111).

Almost surely, 2^{22112211002221} is an apocalyptic number.

It is an amenable number.

22112211002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112211002221 is an equidigital number, since it uses as much as digits as its factorization.

22112211002221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22112211002221 its reverse (12220011221122), we get a palindrome (34332222223343).

The spelling of 22112211002221 in words is "twenty-two trillion, one hundred twelve billion, two hundred eleven million, two thousand, two hundred twenty-one".