11121805 has 8 divisors (see below), whose sum is σ = 13397400. Its totient is φ = 8863296.

The previous prime is 11121767. The next prime is 11121823. The reversal of 11121805 is 50812111.

It is a happy number.

11121805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1022121 + 10099684 = 1011^2 + 3178^2 .

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 11121805 - 2¹⁵ = 11089037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2790 + ... + 5479.

It is an arithmetic number, because the mean of its divisors is an integer number (1674675).

Almost surely, 2^11121805 is an apocalyptic number.

It is an amenable number.

11121805 is a deficient number, since it is larger than the sum of its proper divisors (2275595).

11121805 is an equidigital number, since it uses as much as digits as its factorization.

11121805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 11121805 is about 3334.9370308898. The cubic root of 11121805 is about 223.2158821554.

Adding to 11121805 its reverse (50812111), we get a palindrome (61933916).

The spelling of 11121805 in words is "eleven million, one hundred twenty-one thousand, eight hundred five".