21222030330 has 24 divisors (see below), whose sum is σ = 55177279092. Its totient is φ = 5659208064.

The previous prime is 21222030317. The next prime is 21222030341. The reversal of 21222030330 is 3303022212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20953431009 + 268599321 = 144753^2 + 16389^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 117900079 + ... + 117900258.

Almost surely, 2^21222030330 is an apocalyptic number.

21222030330 is an abundant number, since it is smaller than the sum of its proper divisors (33955248762).

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

21222030330 is a wasteful number, since it uses less digits than its factorization.

21222030330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235800350 (or 235800347 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21222030330 its reverse (3303022212), we get a palindrome (24525052542).

The spelling of 21222030330 in words is "twenty-one billion, two hundred twenty-two million, thirty thousand, three hundred thirty".