11081111 has 4 divisors (see below), whose sum is σ = 11351424. Its totient is φ = 10810800.

The previous prime is 11081107. The next prime is 11081113. The reversal of 11081111 is 11118011.

It is a happy number.

11081111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11081111 - 2² = 11081107 is a prime.

11081111 is a modest number, since divided by 1111 gives 1108 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11081113) 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, 135095 + ... + 135176.

It is an arithmetic number, because the mean of its divisors is an integer number (2837856).

Almost surely, 2^11081111 is an apocalyptic number.

11081111 is a deficient number, since it is larger than the sum of its proper divisors (270313).

11081111 is an equidigital number, since it uses as much as digits as its factorization.

11081111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270312.

The product of its (nonzero) digits is 8, while the sum is 14.

The square root of 11081111 is about 3328.8302750366. The cubic root of 11081111 is about 222.9433050454.

Adding to 11081111 its reverse (11118011), we get a palindrome (22199122).

The spelling of 11081111 in words is "eleven million, eighty-one thousand, one hundred eleven".