222112102221 has 12 divisors (see below), whose sum is σ = 320834720700. Its totient is φ = 148071906240.

The previous prime is 222112102211. The next prime is 222112102253. The reversal of 222112102221 is 122201211222.

It is a happy number.

222112102221 is a `hidden beast` number, since 22 + 211 + 210 + 2 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 141612226596 + 80499875625 = 376314^2 + 283725^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222112102221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222112102194 and 222112102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112102211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334105 + ... + 745553.

It is an arithmetic number, because the mean of its divisors is an integer number (26736226725).

Almost surely, 2^222112102221 is an apocalyptic number.

It is an amenable number.

222112102221 is a deficient number, since it is larger than the sum of its proper divisors (98722618479).

222112102221 is a wasteful number, since it uses less digits than its factorization.

222112102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471436 (or 471433 counting only the distinct ones).

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

Adding to 222112102221 its reverse (122201211222), we get a palindrome (344313313443).

The spelling of 222112102221 in words is "two hundred twenty-two billion, one hundred twelve million, one hundred two thousand, two hundred twenty-one".