22109321 has 8 divisors (see below), whose sum is σ = 24260040. Its totient is φ = 20022912.

The previous prime is 22109287. The next prime is 22109341. The reversal of 22109321 is 12390122.

It can be written as a sum of positive squares in 4 ways, for example, as 19321 + 22090000 = 139^2 + 4700^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22109321 - 2⁶ = 22109257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22109293 and 22109302.

It is not an unprimeable number, because it can be changed into a prime (22109341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15356 + ... + 16733.

It is an arithmetic number, because the mean of its divisors is an integer number (3032505).

Almost surely, 2^22109321 is an apocalyptic number.

It is an amenable number.

22109321 is a deficient number, since it is larger than the sum of its proper divisors (2150719).

22109321 is a wasteful number, since it uses less digits than its factorization.

22109321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32155.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 22109321 is about 4702.0549762843. The cubic root of 22109321 is about 280.6672902669.

Adding to 22109321 its reverse (12390122), we get a palindrome (34499443).

The spelling of 22109321 in words is "twenty-two million, one hundred nine thousand, three hundred twenty-one".