11155122197 has 2 divisors, whose sum is σ = 11155122198. Its totient is φ = 11155122196.

The previous prime is 11155122163. The next prime is 11155122227. The reversal of 11155122197 is 79122155111.

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., 6342370321 + 4812751876 = 79639^2 + 69374^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155122197 - 2⁶ = 11155122133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155122127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577561098 + 5577561099.

It is an arithmetic number, because the mean of its divisors is an integer number (5577561099).

Almost surely, 2^11155122197 is an apocalyptic number.

It is an amenable number.

11155122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155122197 is an equidigital number, since it uses as much as digits as its factorization.

11155122197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 35.

The spelling of 11155122197 in words is "eleven billion, one hundred fifty-five million, one hundred twenty-two thousand, one hundred ninety-seven".