9191000091011 has 2 divisors, whose sum is σ = 9191000091012. Its totient is φ = 9191000091010.

The previous prime is 9191000090999. The next prime is 9191000091061. The reversal of 9191000091011 is 1101900001919.

9191000091011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9191000091011 - 2³⁰ = 9189926349187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9191000091061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595500045505 + 4595500045506.

It is an arithmetic number, because the mean of its divisors is an integer number (4595500045506).

Almost surely, 2^{9191000091011} is an apocalyptic number.

9191000091011 is a deficient number, since it is larger than the sum of its proper divisors (1).

9191000091011 is an equidigital number, since it uses as much as digits as its factorization.

9191000091011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 9191000091011 in words is "nine trillion, one hundred ninety-one billion, ninety-one thousand, eleven".