212112221122 has 16 divisors (see below), whose sum is σ = 319614201144. Its totient is φ = 105574896000.

The previous prime is 212112221089. The next prime is 212112221137. The reversal of 212112221122 is 221122211212.

It can be written as a sum of positive squares in 4 ways, for example, as 172872176841 + 39240044281 = 415779^2 + 198091^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 212112221122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388972 + ... + 758632.

Almost surely, 2^212112221122 is an apocalyptic number.

212112221122 is a deficient number, since it is larger than the sum of its proper divisors (107501980022).

212112221122 is a wasteful number, since it uses less digits than its factorization.

212112221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370965.

The product of its digits is 128, while the sum is 19.

Adding to 212112221122 its reverse (221122211212), we get a palindrome (433234432334).

The spelling of 212112221122 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-two".