212212222122 has 16 divisors (see below), whose sum is σ = 424450730592. Its totient is φ = 70733026320.

The previous prime is 212212222121. The next prime is 212212222169. The reversal of 212212222122 is 221222212212.

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

It is not an unprimeable number, because it can be changed into a prime (212212222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989529 + ... + 1184732.

It is an arithmetic number, because the mean of its divisors is an integer number (26528170662).

Almost surely, 2^212212222122 is an apocalyptic number.

212212222122 is an abundant number, since it is smaller than the sum of its proper divisors (212238508470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212212222122 is a wasteful number, since it uses less digits than its factorization.

212212222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190533.

The product of its digits is 512, while the sum is 21.

Adding to 212212222122 its reverse (221222212212), we get a palindrome (433434434334).

The spelling of 212212222122 in words is "two hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-two".