11221220211197 has 2 divisors, whose sum is σ = 11221220211198. Its totient is φ = 11221220211196.

The previous prime is 11221220211169. The next prime is 11221220211211. The reversal of 11221220211197 is 79111202212211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11160336622681 + 60883588516 = 3340709^2 + 246746^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221220211197 - 2¹² = 11221220207101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221220211497) 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, 5610610105598 + 5610610105599.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610105599).

Almost surely, 2^{11221220211197} is an apocalyptic number.

It is an amenable number.

11221220211197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221220211197 is an equidigital number, since it uses as much as digits as its factorization.

11221220211197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The spelling of 11221220211197 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred ninety-seven".