22222121121222 has 64 divisors (see below), whose sum is σ = 52305281293824. Its totient is φ = 6218277578240.

The previous prime is 22222121121199. The next prime is 22222121121229. The reversal of 22222121121222 is 22212112122222.

It is a happy number.

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 = 22222121121192 and 22222121121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222121121229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186787818 + ... + 186906749.

It is an arithmetic number, because the mean of its divisors is an integer number (817270020216).

Almost surely, 2^{22222121121222} is an apocalyptic number.

22222121121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22222121121222 is an abundant number, since it is smaller than the sum of its proper divisors (30083160172602).

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

22222121121222 is a wasteful number, since it uses less digits than its factorization.

22222121121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373694653.

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

Adding to 22222121121222 its reverse (22212112122222), we get a palindrome (44434233243444).

It can be divided in two parts, 22 and 222121121222, that multiplied together give a palindrome (4886664666884).

The spelling of 22222121121222 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".