111166991111 has 8 divisors (see below), whose sum is σ = 127655875200. Its totient is φ = 95741906040.

The previous prime is 111166991093. The next prime is 111166991119. The reversal of 111166991111 is 111199661111.

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

It is not a de Polignac number, because 111166991111 - 2¹⁴ = 111166974727 is a prime.

111166991111 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111166991119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265949531 + ... + 265949948.

It is an arithmetic number, because the mean of its divisors is an integer number (15956984400).

Almost surely, 2^111166991111 is an apocalyptic number.

111166991111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111166991111 is a deficient number, since it is larger than the sum of its proper divisors (16488884089).

111166991111 is a wasteful number, since it uses less digits than its factorization.

111166991111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531899509.

The product of its digits is 2916, while the sum is 38.

The spelling of 111166991111 in words is "one hundred eleven billion, one hundred sixty-six million, nine hundred ninety-one thousand, one hundred eleven".