22221122211222 has 64 divisors (see below), whose sum is σ = 51345461551104. Its totient is φ = 6344772049440.

The previous prime is 22221122211149. The next prime is 22221122211227. The reversal of 22221122211222 is 22211222112222.

It is a happy number.

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

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22221122211192 and 22221122211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221122211227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109140238 + ... + 109343649.

It is an arithmetic number, because the mean of its divisors is an integer number (802272836736).

Almost surely, 2^{22221122211222} is an apocalyptic number.

22221122211222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22221122211222 is an abundant number, since it is smaller than the sum of its proper divisors (29124339339882).

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

22221122211222 is a wasteful number, since it uses less digits than its factorization.

22221122211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218483993.

The product of its digits is 1024, while the sum is 24.

Adding to 22221122211222 its reverse (22211222112222), we get a palindrome (44432344323444).

It can be divided in two parts, 2 and 2221122211222, that multiplied together give a palindrome (4442244422444).

The spelling of 22221122211222 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".