222121122222222 has 48 divisors (see below), whose sum is σ = 482255012601648. Its totient is φ = 73887677055360.

The previous prime is 222121122222179. The next prime is 222121122222281. The reversal of 222121122222222 is 222222221121222.

222121122222222 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 211 + 2 + 2 + 222 + 222 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 366589188 + ... + 367194600.

It is an arithmetic number, because the mean of its divisors is an integer number (10046979429201).

Almost surely, 2^{222121122222222} is an apocalyptic number.

222121122222222 is an abundant number, since it is smaller than the sum of its proper divisors (260133890379426).

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

222121122222222 is a wasteful number, since it uses less digits than its factorization.

222121122222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647425 (or 647422 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

Adding to 222121122222222 its reverse (222222221121222), we get a palindrome (444343343343444).

The spelling of 222121122222222 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".