11109991111 has 8 divisors (see below), whose sum is σ = 11134685520. Its totient is φ = 11085325248.

The previous prime is 11109991103. The next prime is 11109991117. The reversal of 11109991111 is 11119990111.

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

It is a cyclic number.

It is not a de Polignac number, because 11109991111 - 2³ = 11109991103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11109991117) 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, 893640 + ... + 905986.

It is an arithmetic number, because the mean of its divisors is an integer number (1391835690).

Almost surely, 2^11109991111 is an apocalyptic number.

11109991111 is a deficient number, since it is larger than the sum of its proper divisors (24694409).

11109991111 is a wasteful number, since it uses less digits than its factorization.

11109991111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14273.

The product of its (nonzero) digits is 729, while the sum is 34.

The spelling of 11109991111 in words is "eleven billion, one hundred nine million, nine hundred ninety-one thousand, one hundred eleven".