22221222320 has 40 divisors (see below), whose sum is σ = 56361102480. Its totient is φ = 8080444160.

The previous prime is 22221222319. The next prime is 22221222329. The reversal of 22221222320 is 2322212222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22221222292 and 22221222301.

It is not an unprimeable number, because it can be changed into a prime (22221222329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12624815 + ... + 12626574.

It is an arithmetic number, because the mean of its divisors is an integer number (1409027562).

Almost surely, 2^22221222320 is an apocalyptic number.

22221222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221222320 is an abundant number, since it is smaller than the sum of its proper divisors (34139880160).

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

22221222320 is a wasteful number, since it uses less digits than its factorization.

22221222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25251413 (or 25251407 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 22221222320 its reverse (2322212222), we get a palindrome (24543434542).

The spelling of 22221222320 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, three hundred twenty".