11110099991 has 2 divisors, whose sum is σ = 11110099992. Its totient is φ = 11110099990.

The previous prime is 11110099969. The next prime is 11110100011. The reversal of 11110099991 is 19999001111.

It is a happy number.

11110099991 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 is an emirp because it is prime and its reverse (19999001111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11110099991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11110099901) 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, 5555049995 + 5555049996.

It is an arithmetic number, because the mean of its divisors is an integer number (5555049996).

Almost surely, 2^11110099991 is an apocalyptic number.

11110099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11110099991 is an equidigital number, since it uses as much as digits as its factorization.

11110099991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 11110099991 in words is "eleven billion, one hundred ten million, ninety-nine thousand, nine hundred ninety-one".