212222112122 has 16 divisors (see below), whose sum is σ = 321887625192. Its totient is φ = 104928092160.

The previous prime is 212222112121. The next prime is 212222112127. The reversal of 212222112122 is 221211222212.

It can be written as a sum of positive squares in 4 ways, for example, as 153633425521 + 58588686601 = 391961^2 + 242051^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 212222112094 and 212222112103.

It is not an unprimeable number, because it can be changed into a prime (212222112121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234023 + ... + 692250.

Almost surely, 2^212222112122 is an apocalyptic number.

212222112122 is a deficient number, since it is larger than the sum of its proper divisors (109665513070).

212222112122 is a wasteful number, since it uses less digits than its factorization.

212222112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927553.

The product of its digits is 256, while the sum is 20.

Adding to 212222112122 its reverse (221211222212), we get a palindrome (433433334334).

The spelling of 212222112122 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-two".