111199999991111 has 2 divisors, whose sum is σ = 111199999991112. Its totient is φ = 111199999991110.

The previous prime is 111199999991039. The next prime is 111199999991141.

111199999991111 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111199999991111 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111199999991141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55599999995555 + 55599999995556.

It is an arithmetic number, because the mean of its divisors is an integer number (55599999995556).

Almost surely, 2^{111199999991111} is an apocalyptic number.

111199999991111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111199999991111 is an equidigital number, since it uses as much as digits as its factorization.

111199999991111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4782969, while the sum is 71.

The spelling of 111199999991111 in words is "one hundred eleven trillion, one hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, one hundred eleven".