111111081 has 8 divisors (see below), whose sum is σ = 148204224. Its totient is φ = 74046000.

The previous prime is 111111067. The next prime is 111111089. The reversal of 111111081 is 180111111.

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

It is not a de Polignac number, because 111111081 - 2⁶ = 111111017 is a prime.

It is a super-3 number, since 3×111111081³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 111111081.

It is not an unprimeable number, because it can be changed into a prime (111111089) 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, 5331 + ... + 15831.

It is an arithmetic number, because the mean of its divisors is an integer number (18525528).

Almost surely, 2^111111081 is an apocalyptic number.

It is an amenable number.

111111081 is a deficient number, since it is larger than the sum of its proper divisors (37093143).

111111081 is a wasteful number, since it uses less digits than its factorization.

111111081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14031.

The product of its (nonzero) digits is 8, while the sum is 15.

The square root of 111111081 is about 10540.9241055991. The cubic root of 111111081 is about 480.7498133414.

Adding to 111111081 its reverse (180111111), we get a palindrome (291222192).

The spelling of 111111081 in words is "one hundred eleven million, one hundred eleven thousand, eighty-one".