22211222161 has 2 divisors, whose sum is σ = 22211222162. Its totient is φ = 22211222160.

The previous prime is 22211222093. The next prime is 22211222171. The reversal of 22211222161 is 16122211222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13795911936 + 8415310225 = 117456^2 + 91735^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211222161 - 2⁹ = 22211221649 is a prime.

It is not a weakly prime, because it can be changed into another prime (22211222171) 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, 11105611080 + 11105611081.

It is an arithmetic number, because the mean of its divisors is an integer number (11105611081).

Almost surely, 2^22211222161 is an apocalyptic number.

It is an amenable number.

22211222161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211222161 is an equidigital number, since it uses as much as digits as its factorization.

22211222161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 22.

Adding to 22211222161 its reverse (16122211222), we get a palindrome (38333433383).

The spelling of 22211222161 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred sixty-one".