22121424330 has 128 divisors (see below), whose sum is σ = 54690854400. Its totient is φ = 5724794880.

The previous prime is 22121424289. The next prime is 22121424343. The reversal of 22121424330 is 3342412122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121424330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63384996 + ... + 63385344.

It is an arithmetic number, because the mean of its divisors is an integer number (427272300).

Almost surely, 2^22121424330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121424330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27345427200).

22121424330 is an abundant number, since it is smaller than the sum of its proper divisors (32569430070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121424330 is a wasteful number, since it uses less digits than its factorization.

22121424330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 22121424330 its reverse (3342412122), we get a palindrome (25463836452).

The spelling of 22121424330 in words is "twenty-two billion, one hundred twenty-one million, four hundred twenty-four thousand, three hundred thirty".