212122112212 has 48 divisors (see below), whose sum is σ = 383622220800. Its totient is φ = 102577213440.

The previous prime is 212122112201. The next prime is 212122112239. The reversal of 212122112212 is 212211221212.

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 212122112212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10725589 + ... + 10745347.

It is an arithmetic number, because the mean of its divisors is an integer number (7992129600).

Almost surely, 2^212122112212 is an apocalyptic number.

It is an amenable number.

212122112212 is a deficient number, since it is larger than the sum of its proper divisors (171500108588).

212122112212 is a wasteful number, since it uses less digits than its factorization.

212122112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20536 (or 20534 counting only the distinct ones).

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

Adding to 212122112212 its reverse (212211221212), we get a palindrome (424333333424).

The spelling of 212122112212 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twelve".