22221020220 has 384 divisors, whose sum is σ = 76795084800. Its totient is φ = 4688409600.

The previous prime is 22221020219. The next prime is 22221020243. The reversal of 22221020220 is 2202012222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22221020220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 92974861 + ... + 92975099.

It is an arithmetic number, because the mean of its divisors is an integer number (199987200).

Almost surely, 2^22221020220 is an apocalyptic number.

22221020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38397542400).

22221020220 is an abundant number, since it is smaller than the sum of its proper divisors (54574064580).

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

22221020220 is a wasteful number, since it uses less digits than its factorization.

22221020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22221020220 its reverse (2202012222), we get a palindrome (24423032442).

The spelling of 22221020220 in words is "twenty-two billion, two hundred twenty-one million, twenty thousand, two hundred twenty".