22221021330 has 192 divisors, whose sum is σ = 61303512960. Its totient is φ = 5727352320.

The previous prime is 22221021293. The next prime is 22221021331. The reversal of 22221021330 is 3312012222.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22221021331) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 78519369 + ... + 78519651.

It is an arithmetic number, because the mean of its divisors is an integer number (319289130).

Almost surely, 2^22221021330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221021330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30651756480).

22221021330 is an abundant number, since it is smaller than the sum of its proper divisors (39082491630).

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

22221021330 is a wasteful number, since it uses less digits than its factorization.

22221021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22221021330 its reverse (3312012222), we get a palindrome (25533033552).

The spelling of 22221021330 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, three hundred thirty".