11081 has 4 divisors (see below), whose sum is σ = 12672. Its totient is φ = 9492.

The previous prime is 11071. The next prime is 11083. The reversal of 11081 is 18011.

11081 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-11081 is a prime.

It is a super-3 number, since 3×11081³ = 4081860133323, 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 nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (11083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (3168).

2¹¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

11081 is a deficient number, since it is larger than the sum of its proper divisors (1591).

11081 is an equidigital number, since it uses as much as digits as its factorization.

11081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 11081 is about 105.2663288996. The cubic root of 11081 is about 22.2942560632.

Adding to 11081 its reverse (18011), we get a palindrome (29092).

It can be divided in two parts, 110 and 81, that added together give a palindrome (191).

The spelling of 11081 in words is "eleven thousand, eighty-one".