11101220197 has 2 divisors, whose sum is σ = 11101220198. Its totient is φ = 11101220196.

The previous prime is 11101220191. The next prime is 11101220243. The reversal of 11101220197 is 79102210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7526256516 + 3574963681 = 86754^2 + 59791^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101220197 - 2³ = 11101220189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101220191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550610098 + 5550610099.

It is an arithmetic number, because the mean of its divisors is an integer number (5550610099).

Almost surely, 2^11101220197 is an apocalyptic number.

It is an amenable number.

11101220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101220197 is an equidigital number, since it uses as much as digits as its factorization.

11101220197 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 25.

The spelling of 11101220197 in words is "eleven billion, one hundred one million, two hundred twenty thousand, one hundred ninety-seven".