122222222197 has 2 divisors, whose sum is σ = 122222222198. Its totient is φ = 122222222196.

The previous prime is 122222222191. The next prime is 122222222237. The reversal of 122222222197 is 791222222221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66321185841 + 55901036356 = 257529^2 + 236434^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222222197 - 2¹¹ = 122222220149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122222222191) 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, 61111111098 + 61111111099.

It is an arithmetic number, because the mean of its divisors is an integer number (61111111099).

Almost surely, 2^122222222197 is an apocalyptic number.

It is an amenable number.

122222222197 is a deficient number, since it is larger than the sum of its proper divisors (1).

122222222197 is an equidigital number, since it uses as much as digits as its factorization.

122222222197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The spelling of 122222222197 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred ninety-seven".