222111222222120 has 768 divisors, whose sum is σ = 889337798092800. Its totient is φ = 43315202304000.

The previous prime is 222111222222091. The next prime is 222111222222199. The reversal of 222111222222120 is 21222222111222.

It is a happy number.

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 191 ways as a sum of consecutive naturals, for example, 206096670 + ... + 207171570.

It is an arithmetic number, because the mean of its divisors is an integer number (1157991924600).

Almost surely, 2^{222111222222120} is an apocalyptic number.

222111222222120 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 222111222222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444668899046400).

222111222222120 is an abundant number, since it is smaller than the sum of its proper divisors (667226575870680).

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

222111222222120 is a wasteful number, since it uses less digits than its factorization.

222111222222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075070 (or 1075055 counting only the distinct ones).

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

Adding to 222111222222120 its reverse (21222222111222), we get a palindrome (243333444333342).

The spelling of 222111222222120 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".