212121112212 has 36 divisors (see below), whose sum is σ = 536209011520. Its totient is φ = 70705194192.

The previous prime is 212121112171. The next prime is 212121112249. The reversal of 212121112212 is 212211121212.

212121112212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2635989 + ... + 2715267.

Almost surely, 2^212121112212 is an apocalyptic number.

It is an amenable number.

212121112212 is an abundant number, since it is smaller than the sum of its proper divisors (324087899308).

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

212121112212 is a wasteful number, since it uses less digits than its factorization.

212121112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153612 (or 153607 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 212121112212 its reverse (212211121212), we get a palindrome (424332233424).

The spelling of 212121112212 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twelve".