111100091111 has 8 divisors (see below), whose sum is σ = 112123783440. Its totient is φ = 110077109632.

The previous prime is 111100091101. The next prime is 111100091153. The reversal of 111100091111 is 111190001111.

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-111100091111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111100091111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100091101) 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, 138896 + ... + 491418.

It is an arithmetic number, because the mean of its divisors is an integer number (14015472930).

Almost surely, 2^111100091111 is an apocalyptic number.

111100091111 is a deficient number, since it is larger than the sum of its proper divisors (1023692329).

111100091111 is a wasteful number, since it uses less digits than its factorization.

111100091111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355425.

The product of its (nonzero) digits is 9, while the sum is 17.

Adding to 111100091111 its reverse (111190001111), we get a palindrome (222290092222).

The spelling of 111100091111 in words is "one hundred eleven billion, one hundred million, ninety-one thousand, one hundred eleven".