111110111111111 has 8 divisors (see below), whose sum is σ = 128240241396384. Its totient is φ = 94294295143200.

The previous prime is 111110111111023. The next prime is 111110111111141. The reversal of 111110111111111 is 111111111011111.

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 111110111111111 - 2³⁴ = 111092931241927 is a prime.

It is a super-2 number, since 2×111110111111111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

111110111111111 is a modest number, since divided by 11111111 gives 1111101 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110111111141) 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, 78578578580 + ... + 78578579993.

It is an arithmetic number, because the mean of its divisors is an integer number (16030030174548).

Almost surely, 2^{111110111111111} is an apocalyptic number.

111110111111111 is a deficient number, since it is larger than the sum of its proper divisors (17130130285273).

111110111111111 is a wasteful number, since it uses less digits than its factorization.

111110111111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157157158681.

The product of its (nonzero) digits is 1, while the sum is 14.

Adding to 111110111111111 its reverse (111111111011111), we get a palindrome (222221222122222).

It can be divided in two parts, 11111011111 and 1111, that multiplied together give a palindrome (12344333344321).

The spelling of 111110111111111 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".