11022221 has 16 divisors (see below), whose sum is σ = 13246464. Its totient is φ = 8967024.

The previous prime is 11022217. The next prime is 11022229. The reversal of 11022221 is 12222011.

It is a happy number.

11022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11022221 - 2² = 11022217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35750 + ... + 36056.

It is an arithmetic number, because the mean of its divisors is an integer number (827904).

Almost surely, 2^11022221 is an apocalyptic number.

It is an amenable number.

11022221 is a deficient number, since it is larger than the sum of its proper divisors (2224243).

11022221 is a wasteful number, since it uses less digits than its factorization.

11022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 11022221 is about 3319.9730420592. The cubic root of 11022221 is about 222.5476630627.

Adding to 11022221 its reverse (12222011), we get a palindrome (23244232).

The spelling of 11022221 in words is "eleven million, twenty-two thousand, two hundred twenty-one".