122255197 has 2 divisors, whose sum is σ = 122255198. Its totient is φ = 122255196.

The previous prime is 122255191. The next prime is 122255201. The reversal of 122255197 is 791552221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122014116 + 241081 = 11046^2 + 491^2 .

It is an emirp because it is prime and its reverse (791552221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122255197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122255191) 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, 61127598 + 61127599.

It is an arithmetic number, because the mean of its divisors is an integer number (61127599).

Almost surely, 2^122255197 is an apocalyptic number.

It is an amenable number.

122255197 is a deficient number, since it is larger than the sum of its proper divisors (1).

122255197 is an equidigital number, since it uses as much as digits as its factorization.

122255197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 34.

The square root of 122255197 is about 11056.9072077141. The cubic root of 122255197 is about 496.3131436676.

The spelling of 122255197 in words is "one hundred twenty-two million, two hundred fifty-five thousand, one hundred ninety-seven".