100111111000091 has 2 divisors, whose sum is σ = 100111111000092. Its totient is φ = 100111111000090.

The previous prime is 100111111000067. The next prime is 100111111000133. The reversal of 100111111000091 is 190000111111001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100111111000091 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (100111111000291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055555500045 + 50055555500046.

It is an arithmetic number, because the mean of its divisors is an integer number (50055555500046).

Almost surely, 2^{100111111000091} is an apocalyptic number.

100111111000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100111111000091 is an equidigital number, since it uses as much as digits as its factorization.

100111111000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 17.

Adding to 100111111000091 its reverse (190000111111001), we get a palindrome (290111222111092).

The spelling of 100111111000091 in words is "one hundred trillion, one hundred eleven billion, one hundred eleven million, ninety-one", and thus it is an aban number.