1111000110991 has 2 divisors, whose sum is σ = 1111000110992. Its totient is φ = 1111000110990.

The previous prime is 1111000110989. The next prime is 1111000111027. The reversal of 1111000110991 is 1990110001111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111000110991 - 2¹ = 1111000110989 is a prime.

Together with 1111000110989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111000110911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555500055495 + 555500055496.

It is an arithmetic number, because the mean of its divisors is an integer number (555500055496).

Almost surely, 2^{1111000110991} is an apocalyptic number.

1111000110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111000110991 is an equidigital number, since it uses as much as digits as its factorization.

1111000110991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 1111000110991 in words is "one trillion, one hundred eleven billion, one hundred ten thousand, nine hundred ninety-one".