11066023721 has 4 divisors (see below), whose sum is σ = 11199349392. Its totient is φ = 10932698052.

The previous prime is 11066023693. The next prime is 11066023723. The reversal of 11066023721 is 12732066011.

11066023721 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11066023721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11066023723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66662711 + ... + 66662876.

It is an arithmetic number, because the mean of its divisors is an integer number (2799837348).

Almost surely, 2^11066023721 is an apocalyptic number.

It is an amenable number.

11066023721 is a deficient number, since it is larger than the sum of its proper divisors (133325671).

11066023721 is an equidigital number, since it uses as much as digits as its factorization.

11066023721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133325670.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 11066023721 its reverse (12732066011), we get a palindrome (23798089732).

The spelling of 11066023721 in words is "eleven billion, sixty-six million, twenty-three thousand, seven hundred twenty-one".