2111111110091 has 2 divisors, whose sum is σ = 2111111110092. Its totient is φ = 2111111110090.

The previous prime is 2111111110063. The next prime is 2111111110103. The reversal of 2111111110091 is 1900111111112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111111110091 - 2⁶ = 2111111110027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111111110001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055555555045 + 1055555555046.

It is an arithmetic number, because the mean of its divisors is an integer number (1055555555046).

Almost surely, 2^{2111111110091} is an apocalyptic number.

2111111110091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111111110091 is an equidigital number, since it uses as much as digits as its factorization.

2111111110091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 20.

The spelling of 2111111110091 in words is "two trillion, one hundred eleven billion, one hundred eleven million, one hundred ten thousand, ninety-one".