11101919191091 has 8 divisors (see below), whose sum is σ = 11211929003568. Its totient is φ = 10991911140000.

The previous prime is 11101919191079. The next prime is 11101919191109. The reversal of 11101919191091 is 19019191910111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101919191091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101919191001) 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, 14842661 + ... + 15572681.

It is an arithmetic number, because the mean of its divisors is an integer number (1401491125446).

Almost surely, 2^{11101919191091} is an apocalyptic number.

11101919191091 is a deficient number, since it is larger than the sum of its proper divisors (110009812477).

11101919191091 is a wasteful number, since it uses less digits than its factorization.

11101919191091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880693.

The product of its (nonzero) digits is 6561, while the sum is 44.

The spelling of 11101919191091 in words is "eleven trillion, one hundred one billion, nine hundred nineteen million, one hundred ninety-one thousand, ninety-one".