22221012320 has 144 divisors (see below), whose sum is σ = 57536719632. Its totient is φ = 8105011200.

The previous prime is 22221012313. The next prime is 22221012329. The reversal of 22221012320 is 2321012222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221012329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2239370 + ... + 2249270.

It is an arithmetic number, because the mean of its divisors is an integer number (399560553).

Almost surely, 2^22221012320 is an apocalyptic number.

22221012320 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 22221012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28768359816).

22221012320 is an abundant number, since it is smaller than the sum of its proper divisors (35315707312).

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

22221012320 is a wasteful number, since it uses less digits than its factorization.

22221012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025 (or 10004 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22221012320 its reverse (2321012222), we get a palindrome (24542024542).

The spelling of 22221012320 in words is "twenty-two billion, two hundred twenty-one million, twelve thousand, three hundred twenty".