11101111011091 has 4 divisors (see below), whose sum is σ = 11132558917992. Its totient is φ = 11069663104192.

The previous prime is 11101111011041. The next prime is 11101111011101. The reversal of 11101111011091 is 19011011110111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11101111011091 - 2⁹ = 11101111010579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101111011031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15723952921 + ... + 15723953626.

It is an arithmetic number, because the mean of its divisors is an integer number (2783139729498).

Almost surely, 2^{11101111011091} is an apocalyptic number.

11101111011091 is a deficient number, since it is larger than the sum of its proper divisors (31447906901).

11101111011091 is an equidigital number, since it uses as much as digits as its factorization.

11101111011091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31447906900.

The product of its (nonzero) digits is 9, while the sum is 19.

The spelling of 11101111011091 in words is "eleven trillion, one hundred one billion, one hundred eleven million, eleven thousand, ninety-one".