11066231221 has 8 divisors (see below), whose sum is σ = 11201589504. Its totient is φ = 10930921440.

The previous prime is 11066231179. The next prime is 11066231227. The reversal of 11066231221 is 12213266011.

It is a happy number.

11066231221 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 11066231221 - 2⁹ = 11066230709 is a prime.

It is a super-2 number, since 2×11066231221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11066231227) 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 7 ways as a sum of consecutive naturals, for example, 699420 + ... + 715066.

It is an arithmetic number, because the mean of its divisors is an integer number (1400198688).

Almost surely, 2^11066231221 is an apocalyptic number.

It is an amenable number.

11066231221 is a deficient number, since it is larger than the sum of its proper divisors (135358283).

11066231221 is an equidigital number, since it uses as much as digits as its factorization.

11066231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24251.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 11066231221 its reverse (12213266011), we get a palindrome (23279497232).

The spelling of 11066231221 in words is "eleven billion, sixty-six million, two hundred thirty-one thousand, two hundred twenty-one".