111111011111109 has 8 divisors (see below), whose sum is σ = 149004361721952. Its totient is φ = 73645833953840.

The previous prime is 111111011111053. The next prime is 111111011111129. The reversal of 111111011111109 is 901111110111111.

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 111111011111109 - 2¹¹ = 111111011109061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111011111129) 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, 107043362787 + ... + 107043363824.

It is an arithmetic number, because the mean of its divisors is an integer number (18625545215244).

Almost surely, 2^{111111011111109} is an apocalyptic number.

It is an amenable number.

111111011111109 is a deficient number, since it is larger than the sum of its proper divisors (37893350610843).

111111011111109 is a wasteful number, since it uses less digits than its factorization.

111111011111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214086726787.

The product of its (nonzero) digits is 9, while the sum is 21.

The spelling of 111111011111109 in words is "one hundred eleven trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, one hundred nine".