11220111122197 has 2 divisors, whose sum is σ = 11220111122198. Its totient is φ = 11220111122196.

The previous prime is 11220111122189. The next prime is 11220111122219. The reversal of 11220111122197 is 79122111102211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7031862918756 + 4188248203441 = 2651766^2 + 2046521^2 .

It is an emirp because it is prime and its reverse (79122111102211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11220111122197 - 2³ = 11220111122189 is a prime.

It is a super-2 number, since 2×11220111122197² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220111122107) 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, 5610055561098 + 5610055561099.

It is an arithmetic number, because the mean of its divisors is an integer number (5610055561099).

Almost surely, 2^{11220111122197} is an apocalyptic number.

It is an amenable number.

11220111122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220111122197 is an equidigital number, since it uses as much as digits as its factorization.

11220111122197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 31.

The spelling of 11220111122197 in words is "eleven trillion, two hundred twenty billion, one hundred eleven million, one hundred twenty-two thousand, one hundred ninety-seven".