22231100221 has 12 divisors (see below), whose sum is σ = 24446149056. Its totient is φ = 20201562920.

The previous prime is 22231100219. The next prime is 22231100257. The reversal of 22231100221 is 12200113222.

It is a happy number.

It is not a de Polignac number, because 22231100221 - 2¹ = 22231100219 is a prime.

It is a super-2 number, since 2×22231100221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22231100195 and 22231100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231100201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258546 + ... + 333628.

It is an arithmetic number, because the mean of its divisors is an integer number (2037179088).

Almost surely, 2^22231100221 is an apocalyptic number.

It is an amenable number.

22231100221 is a deficient number, since it is larger than the sum of its proper divisors (2215048835).

22231100221 is a wasteful number, since it uses less digits than its factorization.

22231100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77552 (or 77541 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22231100221 its reverse (12200113222), we get a palindrome (34431213443).

The spelling of 22231100221 in words is "twenty-two billion, two hundred thirty-one million, one hundred thousand, two hundred twenty-one".