9191109091011 has 8 divisors (see below), whose sum is σ = 12308326585680. Its totient is φ = 6100648828512.

The previous prime is 9191109090991. The next prime is 9191109091013. The reversal of 9191109091011 is 1101909011919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9191109091011 - 2⁵ = 9191109090979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9191109091013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6689307240 + ... + 6689308613.

It is an arithmetic number, because the mean of its divisors is an integer number (1538540823210).

Almost surely, 2^{9191109091011} is an apocalyptic number.

9191109091011 is a deficient number, since it is larger than the sum of its proper divisors (3117217494669).

9191109091011 is a wasteful number, since it uses less digits than its factorization.

9191109091011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13378616085.

The product of its (nonzero) digits is 6561, while the sum is 42.

The spelling of 9191109091011 in words is "nine trillion, one hundred ninety-one billion, one hundred nine million, ninety-one thousand, eleven".