11212220012197 has 2 divisors, whose sum is σ = 11212220012198. Its totient is φ = 11212220012196.

The previous prime is 11212220012183. The next prime is 11212220012239. The reversal of 11212220012197 is 79121002221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10091842218756 + 1120377793441 = 3176766^2 + 1058479^2 .

It is an emirp because it is prime and its reverse (79121002221211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212220012197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212220012107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606110006098 + 5606110006099.

It is an arithmetic number, because the mean of its divisors is an integer number (5606110006099).

Almost surely, 2^{11212220012197} is an apocalyptic number.

It is an amenable number.

11212220012197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212220012197 is an equidigital number, since it uses as much as digits as its factorization.

11212220012197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 11212220012197 in words is "eleven trillion, two hundred twelve billion, two hundred twenty million, twelve thousand, one hundred ninety-seven".