222222121122120 has 256 divisors, whose sum is σ = 762574139712000. Its totient is φ = 50748992126976.

The previous prime is 222222121122109. The next prime is 222222121122161. The reversal of 222222121122120 is 21221121222222.

It is a happy number.

It is a super-2 number, since 2×222222121122120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9294484726 + ... + 9294508634.

It is an arithmetic number, because the mean of its divisors is an integer number (2978805233250).

Almost surely, 2^{222222121122120} is an apocalyptic number.

222222121122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222222121122120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381287069856000).

222222121122120 is an abundant number, since it is smaller than the sum of its proper divisors (540352018589880).

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

222222121122120 is a wasteful number, since it uses less digits than its factorization.

222222121122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33192 (or 33188 counting only the distinct ones).

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

Adding to 222222121122120 its reverse (21221121222222), we get a palindrome (243443242344342).

It can be divided in two parts, 22222212 and 1122120, that added together give a palindrome (23344332).

The spelling of 222222121122120 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty".