22221221222 has 8 divisors (see below), whose sum is σ = 33335970672. Its totient is φ = 11109231000.

The previous prime is 22221221201. The next prime is 22221221249. The reversal of 22221221222 is 22212212222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22221221194 and 22221221203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669554 + ... + 701957.

It is an arithmetic number, because the mean of its divisors is an integer number (4166996334).

Almost surely, 2^22221221222 is an apocalyptic number.

22221221222 is a deficient number, since it is larger than the sum of its proper divisors (11114749450).

22221221222 is a wasteful number, since it uses less digits than its factorization.

22221221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379614.

The product of its digits is 512, while the sum is 20.

Adding to 22221221222 its reverse (22212212222), we get a palindrome (44433433444).

It can be divided in two parts, 2 and 2221221222, that multiplied together give a palindrome (4442442444).

The spelling of 22221221222 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".