22221122212222 has 16 divisors (see below), whose sum is σ = 34612386161472. Its totient is φ = 10691084522880.

The previous prime is 22221122212169. The next prime is 22221122212229. The reversal of 22221122212222 is 22221222112222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221122212229) 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, 1856085078 + ... + 1856097049.

It is an arithmetic number, because the mean of its divisors is an integer number (2163274135092).

Almost surely, 2^{22221122212222} is an apocalyptic number.

22221122212222 is a deficient number, since it is larger than the sum of its proper divisors (12391263949250).

22221122212222 is a wasteful number, since it uses less digits than its factorization.

22221122212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712182243.

The product of its digits is 2048, while the sum is 25.

Adding to 22221122212222 its reverse (22221222112222), we get a palindrome (44442344324444).

The spelling of 22221122212222 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-two".