22221012220 has 24 divisors (see below), whose sum is σ = 50906319408. Its totient is φ = 8080368000.

The previous prime is 22221012217. The next prime is 22221012271. The reversal of 22221012220 is 2221012222.

It is a junction number, because it is equal to n+sod(n) for n = 22221012194 and 22221012203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50502081 + ... + 50502520.

It is an arithmetic number, because the mean of its divisors is an integer number (2121096642).

Almost surely, 2^22221012220 is an apocalyptic number.

22221012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221012220 is an abundant number, since it is smaller than the sum of its proper divisors (28685307188).

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

22221012220 is a wasteful number, since it uses less digits than its factorization.

22221012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101004621 (or 101004619 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22221012220 its reverse (2221012222), we get a palindrome (24442024442).

The spelling of 22221012220 in words is "twenty-two billion, two hundred twenty-one million, twelve thousand, two hundred twenty".