22324212221 has 4 divisors (see below), whose sum is σ = 22868705244. Its totient is φ = 21779719200.

The previous prime is 22324212217. The next prime is 22324212227. The reversal of 22324212221 is 12221242322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11922456100 + 10401756121 = 109190^2 + 101989^2 .

It is a cyclic number.

It is not a de Polignac number, because 22324212221 - 2² = 22324212217 is a prime.

It is a super-3 number, since 3×22324212221³ (a number of 32 digits) contains 333 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 (22324212227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272246450 + ... + 272246531.

It is an arithmetic number, because the mean of its divisors is an integer number (5717176311).

Almost surely, 2^22324212221 is an apocalyptic number.

It is an amenable number.

22324212221 is a deficient number, since it is larger than the sum of its proper divisors (544493023).

22324212221 is an equidigital number, since it uses as much as digits as its factorization.

22324212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544493022.

The product of its digits is 1536, while the sum is 23.

Adding to 22324212221 its reverse (12221242322), we get a palindrome (34545454543).

The spelling of 22324212221 in words is "twenty-two billion, three hundred twenty-four million, two hundred twelve thousand, two hundred twenty-one".