222120211212 has 72 divisors (see below), whose sum is σ = 586582673040. Its totient is φ = 70779139200.

The previous prime is 222120211163. The next prime is 222120211217. The reversal of 222120211212 is 212112021222.

It is a happy number.

222120211212 is a `hidden beast` number, since 2 + 221 + 20 + 211 + 212 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (222120211217) 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, 947818 + ... + 1158705.

It is an arithmetic number, because the mean of its divisors is an integer number (8146981570).

Almost surely, 2^222120211212 is an apocalyptic number.

It is an amenable number.

222120211212 is an abundant number, since it is smaller than the sum of its proper divisors (364462461828).

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

222120211212 is a wasteful number, since it uses less digits than its factorization.

222120211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106663 (or 2106658 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222120211212 its reverse (212112021222), we get a palindrome (434232232434).

The spelling of 222120211212 in words is "two hundred twenty-two billion, one hundred twenty million, two hundred eleven thousand, two hundred twelve".