11216811 has 4 divisors (see below), whose sum is σ = 14955752. Its totient is φ = 7477872.

The previous prime is 11216791. The next prime is 11216813. The reversal of 11216811 is 11861211.

It is a happy number.

11216811 is digitally balanced in base 3, 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 not a de Polignac number, because 11216811 - 2⁷ = 11216683 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11216813) 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, 1869466 + ... + 1869471.

It is an arithmetic number, because the mean of its divisors is an integer number (3738938).

Almost surely, 2^11216811 is an apocalyptic number.

11216811 is a deficient number, since it is larger than the sum of its proper divisors (3738941).

11216811 is an equidigital number, since it uses as much as digits as its factorization.

11216811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738940.

The product of its digits is 96, while the sum is 21.

The square root of 11216811 is about 3349.1507878864. The cubic root of 11216811 is about 223.8496745969.

The spelling of 11216811 in words is "eleven million, two hundred sixteen thousand, eight hundred eleven".