222112130221 has 4 divisors (see below), whose sum is σ = 223339269244. Its totient is φ = 220884991200.

The previous prime is 222112130209. The next prime is 222112130231. The reversal of 222112130221 is 122031211222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79798340196 + 142313790025 = 282486^2 + 377245^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112130221 - 2²¹ = 222110033069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112130231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613569240 + ... + 613569601.

It is an arithmetic number, because the mean of its divisors is an integer number (55834817311).

Almost surely, 2^222112130221 is an apocalyptic number.

It is an amenable number.

222112130221 is a deficient number, since it is larger than the sum of its proper divisors (1227139023).

222112130221 is a wasteful number, since it uses less digits than its factorization.

222112130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227139022.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222112130221 its reverse (122031211222), we get a palindrome (344143341443).

The spelling of 222112130221 in words is "two hundred twenty-two billion, one hundred twelve million, one hundred thirty thousand, two hundred twenty-one".