22210221 has 16 divisors (see below), whose sum is σ = 34007040. Its totient is φ = 12751920.

The previous prime is 22210213. The next prime is 22210267. The reversal of 22210221 is 12201222.

It is not a de Polignac number, because 22210221 - 2³ = 22210213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22210197 and 22210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210121) 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, 17085 + ... + 18338.

It is an arithmetic number, because the mean of its divisors is an integer number (2125440).

Almost surely, 2^22210221 is an apocalyptic number.

It is an amenable number.

22210221 is a deficient number, since it is larger than the sum of its proper divisors (11796819).

22210221 is a wasteful number, since it uses less digits than its factorization.

22210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35456.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22210221 is about 4712.7721141596. The cubic root of 22210221 is about 281.0936015394.

Adding to 22210221 its reverse (12201222), we get a palindrome (34411443).

The spelling of 22210221 in words is "twenty-two million, two hundred ten thousand, two hundred twenty-one".