110981 has 4 divisors (see below), whose sum is σ = 119532. Its totient is φ = 102432.

The previous prime is 110977. The next prime is 110989. The reversal of 110981 is 189011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58081 + 52900 = 241^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 110981 - 2² = 110977 is a prime.

It is a super-2 number, since 2×110981² = 24633564722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4256 + ... + 4281.

It is an arithmetic number, because the mean of its divisors is an integer number (29883).

2¹¹⁰⁹⁸¹ is an apocalyptic number.

It is an amenable number.

110981 is a deficient number, since it is larger than the sum of its proper divisors (8551).

110981 is an equidigital number, since it uses as much as digits as its factorization.

110981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8550.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 110981 is about 333.1381094981. The cubic root of 110981 is about 48.0562130780.

Adding to 110981 its reverse (189011), we get a palindrome (299992).

The spelling of 110981 in words is "one hundred ten thousand, nine hundred eighty-one".