222222122222120 has 16 divisors (see below), whose sum is σ = 499999774999860. Its totient is φ = 88888848888832.

The previous prime is 222222122222071. The next prime is 222222122222159. The reversal of 222222122222120 is 21222221222222.

It can be written as a sum of positive squares in 2 ways, for example, as 222079916303716 + 142205918404 = 14902346^2 + 377102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 222222122222120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777776527737 + ... + 2777776527816.

Almost surely, 2^{222222122222120} is an apocalyptic number.

222222122222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222122222120 is an abundant number, since it is smaller than the sum of its proper divisors (277777652777740).

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

222222122222120 is a wasteful number, since it uses less digits than its factorization.

222222122222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555553055564 (or 5555553055560 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 222222122222120 its reverse (21222221222222), we get a palindrome (243444343444342).

The spelling of 222222122222120 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".