111081 has 8 divisors (see below), whose sum is σ = 150784. Its totient is φ = 72720.

The previous prime is 111053. The next prime is 111091. The reversal of 111081 is 180111.

It is a happy number.

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

It is not a de Polignac number, because 111081 - 2⁵ = 111049 is a prime.

It is a super-3 number, since 3×111081³ = 4111881565033323, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111031) 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, 121 + ... + 486.

It is an arithmetic number, because the mean of its divisors is an integer number (18848).

2¹¹¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

111081 is a deficient number, since it is larger than the sum of its proper divisors (39703).

111081 is an equidigital number, since it uses as much as digits as its factorization.

111081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 111081 is about 333.2881636062. The cubic root of 111081 is about 48.0706425109.

Adding to 111081 its reverse (180111), we get a palindrome (291192).

The spelling of 111081 in words is "one hundred eleven thousand, eighty-one".