11199966445571 has 2 divisors, whose sum is σ = 11199966445572. Its totient is φ = 11199966445570.

The previous prime is 11199966445559. The next prime is 11199966445597. The reversal of 11199966445571 is 17554466999111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11199966445571 - 2²² = 11199962251267 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11199966445771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599983222785 + 5599983222786.

It is an arithmetic number, because the mean of its divisors is an integer number (5599983222786).

Almost surely, 2^{11199966445571} is an apocalyptic number.

11199966445571 is a deficient number, since it is larger than the sum of its proper divisors (1).

11199966445571 is an equidigital number, since it uses as much as digits as its factorization.

11199966445571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73483200, while the sum is 68.

The spelling of 11199966445571 in words is "eleven trillion, one hundred ninety-nine billion, nine hundred sixty-six million, four hundred forty-five thousand, five hundred seventy-one".