11006221 has 4 divisors (see below), whose sum is σ = 11053692. Its totient is φ = 10958752.

The previous prime is 11006161. The next prime is 11006243. The reversal of 11006221 is 12260011.

11006221 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, and also an emirpimes, since its reverse is a distinct semiprime: 12260011 = 29 ⋅422759.

It can be written as a sum of positive squares in 2 ways, for example, as 855625 + 10150596 = 925^2 + 3186^2 .

It is a cyclic number.

It is not a de Polignac number, because 11006221 - 2¹⁷ = 10875149 is a prime.

It is a super-2 number, since 2×11006221² = 242273801401682, which 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 (11006251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23386 + ... + 23851.

It is an arithmetic number, because the mean of its divisors is an integer number (2763423).

Almost surely, 2^11006221 is an apocalyptic number.

It is an amenable number.

11006221 is a deficient number, since it is larger than the sum of its proper divisors (47471).

11006221 is an equidigital number, since it uses as much as digits as its factorization.

11006221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47470.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 11006221 is about 3317.5625088308. The cubic root of 11006221 is about 222.4399265502.

Adding to 11006221 its reverse (12260011), we get a palindrome (23266232).

The spelling of 11006221 in words is "eleven million, six thousand, two hundred twenty-one".