22221222220 has 36 divisors (see below), whose sum is σ = 48218475312. Its totient is φ = 8601756000.

The previous prime is 22221222217. The next prime is 22221222253. The reversal of 22221222220 is 2222212222.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558856 + ... + 597295.

It is an arithmetic number, because the mean of its divisors is an integer number (1339402092).

Almost surely, 2^22221222220 is an apocalyptic number.

22221222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221222220 is an abundant number, since it is smaller than the sum of its proper divisors (25997253092).

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

22221222220 is a wasteful number, since it uses less digits than its factorization.

22221222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156222 (or 1156189 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 22221222220 its reverse (2222212222), we get a palindrome (24443434442).

The spelling of 22221222220 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".