122540115197 has 2 divisors, whose sum is σ = 122540115198. Its totient is φ = 122540115196.

The previous prime is 122540115163. The next prime is 122540115199. The reversal of 122540115197 is 791511045221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109414746841 + 13125368356 = 330779^2 + 114566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122540115197 is a prime.

Together with 122540115199, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122540115197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122540115199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61270057598 + 61270057599.

It is an arithmetic number, because the mean of its divisors is an integer number (61270057599).

Almost surely, 2^122540115197 is an apocalyptic number.

It is an amenable number.

122540115197 is a deficient number, since it is larger than the sum of its proper divisors (1).

122540115197 is an equidigital number, since it uses as much as digits as its factorization.

122540115197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 38.

The spelling of 122540115197 in words is "one hundred twenty-two billion, five hundred forty million, one hundred fifteen thousand, one hundred ninety-seven".