222111212122 has 8 divisors (see below), whose sum is σ = 333181265076. Its totient is φ = 111050790432.

The previous prime is 222111212093. The next prime is 222111212159. The reversal of 222111212122 is 221212111222.

It can be written as a sum of positive squares in 2 ways, for example, as 219868147801 + 2243064321 = 468901^2 + 47361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 222111212122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349883 + ... + 2442574.

Almost surely, 2^222111212122 is an apocalyptic number.

222111212122 is a deficient number, since it is larger than the sum of its proper divisors (111070052954).

222111212122 is a wasteful number, since it uses less digits than its factorization.

222111212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815632.

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

Adding to 222111212122 its reverse (221212111222), we get a palindrome (443323323344).

The spelling of 222111212122 in words is "two hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty-two".