11011220111197 has 2 divisors, whose sum is σ = 11011220111198. Its totient is φ = 11011220111196.

The previous prime is 11011220111183. The next prime is 11011220111231. The reversal of 11011220111197 is 79111102211011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10175423731236 + 835796379961 = 3189894^2 + 914219^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011220111197 - 2¹⁹ = 11011219586909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011220111497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505610055598 + 5505610055599.

It is an arithmetic number, because the mean of its divisors is an integer number (5505610055599).

Almost surely, 2^{11011220111197} is an apocalyptic number.

It is an amenable number.

11011220111197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011220111197 is an equidigital number, since it uses as much as digits as its factorization.

11011220111197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 28.

The spelling of 11011220111197 in words is "eleven trillion, eleven billion, two hundred twenty million, one hundred eleven thousand, one hundred ninety-seven".