10111099991 has 2 divisors, whose sum is σ = 10111099992. Its totient is φ = 10111099990.

The previous prime is 10111099981. The next prime is 10111099997. The reversal of 10111099991 is 19999011101.

It is a happy number.

10111099991 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 a cyclic number.

It is not a de Polignac number, because 10111099991 - 2³⁰ = 9037358167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111099997) 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, 5055549995 + 5055549996.

It is an arithmetic number, because the mean of its divisors is an integer number (5055549996).

Almost surely, 2^10111099991 is an apocalyptic number.

10111099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111099991 is an equidigital number, since it uses as much as digits as its factorization.

10111099991 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 10111099991 in words is "ten billion, one hundred eleven million, ninety-nine thousand, nine hundred ninety-one".