11601198209 has 2 divisors, whose sum is σ = 11601198210. Its totient is φ = 11601198208.

The previous prime is 11601198121. The next prime is 11601198211. The reversal of 11601198209 is 90289110611.

11601198209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10360186225 + 1241011984 = 101785^2 + 35228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11601198209 is a prime.

Together with 11601198211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11601198299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800599104 + 5800599105.

It is an arithmetic number, because the mean of its divisors is an integer number (5800599105).

Almost surely, 2^11601198209 is an apocalyptic number.

It is an amenable number.

11601198209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11601198209 is an equidigital number, since it uses as much as digits as its factorization.

11601198209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 11601198209 in words is "eleven billion, six hundred one million, one hundred ninety-eight thousand, two hundred nine".