22544121121 has 4 divisors (see below), whose sum is σ = 22852944772. Its totient is φ = 22235297472.

The previous prime is 22544121113. The next prime is 22544121151. The reversal of 22544121121 is 12112144522.

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 6215114896 + 16329006225 = 78836^2 + 127785^2 .

It is a cyclic number.

It is not a de Polignac number, because 22544121121 - 2³ = 22544121113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22544121151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154411716 + ... + 154411861.

It is an arithmetic number, because the mean of its divisors is an integer number (5713236193).

Almost surely, 2^22544121121 is an apocalyptic number.

It is an amenable number.

22544121121 is a deficient number, since it is larger than the sum of its proper divisors (308823651).

22544121121 is an equidigital number, since it uses as much as digits as its factorization.

22544121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308823650.

The product of its digits is 1280, while the sum is 25.

Adding to 22544121121 its reverse (12112144522), we get a palindrome (34656265643).

The spelling of 22544121121 in words is "twenty-two billion, five hundred forty-four million, one hundred twenty-one thousand, one hundred twenty-one".