222220120212 has 72 divisors (see below), whose sum is σ = 575617660800. Its totient is φ = 72242340480.

The previous prime is 222220120189. The next prime is 222220120217. The reversal of 222220120212 is 212021022222.

222220120212 is a `hidden beast` number, since 222 + 220 + 12 + 0 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220120217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4644789 + ... + 4692387.

Almost surely, 2^222220120212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222220120212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287808830400).

222220120212 is an abundant number, since it is smaller than the sum of its proper divisors (353397540588).

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

222220120212 is a wasteful number, since it uses less digits than its factorization.

222220120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50813 (or 50808 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222220120212 its reverse (212021022222), we get a palindrome (434241142434).

The spelling of 222220120212 in words is "two hundred twenty-two billion, two hundred twenty million, one hundred twenty thousand, two hundred twelve".