22220210221 has 6 divisors (see below), whose sum is σ = 24423867566. Its totient is φ = 20200191000.

The previous prime is 22220210191. The next prime is 22220210237. The reversal of 22220210221 is 12201202222.

It can be written as a sum of positive squares in only one way, i.e., 21642528996 + 577681225 = 147114^2 + 24035^2 .

It is not a de Polignac number, because 22220210221 - 2¹³ = 22220202029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220210195 and 22220210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220210261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91818930 + ... + 91819171.

Almost surely, 2^22220210221 is an apocalyptic number.

It is an amenable number.

22220210221 is a deficient number, since it is larger than the sum of its proper divisors (2203657345).

22220210221 is a wasteful number, since it uses less digits than its factorization.

22220210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183638123 (or 183638112 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22220210221 its reverse (12201202222), we get a palindrome (34421412443).

The spelling of 22220210221 in words is "twenty-two billion, two hundred twenty million, two hundred ten thousand, two hundred twenty-one".