1011111000091 has 2 divisors, whose sum is σ = 1011111000092. Its totient is φ = 1011111000090.

The previous prime is 1011111000059. The next prime is 1011111000127. The reversal of 1011111000091 is 1900001111101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011111000091 - 2⁵ = 1011111000059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011111000191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505555500045 + 505555500046.

It is an arithmetic number, because the mean of its divisors is an integer number (505555500046).

Almost surely, 2^{1011111000091} is an apocalyptic number.

1011111000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011111000091 is an equidigital number, since it uses as much as digits as its factorization.

1011111000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 16.

Adding to 1011111000091 its reverse (1900001111101), we get a palindrome (2911112111192).

The spelling of 1011111000091 in words is "one trillion, eleven billion, one hundred eleven million, ninety-one", and thus it is an aban number.