11281111 has 8 divisors (see below), whose sum is σ = 11491200. Its totient is φ = 11072952.

The previous prime is 11281097. The next prime is 11281133. The reversal of 11281111 is 11118211.

11281111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11281111 - 2¹⁷ = 11150039 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281141) 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, 16176 + ... + 16858.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^11281111 is an apocalyptic number.

11281111 is a deficient number, since it is larger than the sum of its proper divisors (210089).

11281111 is an equidigital number, since it uses as much as digits as its factorization.

11281111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its digits is 16, while the sum is 16.

The square root of 11281111 is about 3358.7365183950. The cubic root of 11281111 is about 224.2765968254.

Adding to 11281111 its reverse (11118211), we get a palindrome (22399322).

The spelling of 11281111 in words is "eleven million, two hundred eighty-one thousand, one hundred eleven".