212121212208 has 20 divisors (see below), whose sum is σ = 547979798328. Its totient is φ = 70707070720.

The previous prime is 212121212183. The next prime is 212121212209. The reversal of 212121212208 is 802212121212.

212121212208 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (212121212209) 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 3 ways as a sum of consecutive naturals, for example, 2209595913 + ... + 2209596008.

Almost surely, 2^212121212208 is an apocalyptic number.

It is an amenable number.

212121212208 is an abundant number, since it is smaller than the sum of its proper divisors (335858586120).

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

212121212208 is a wasteful number, since it uses less digits than its factorization.

212121212208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419191932 (or 4419191926 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The spelling of 212121212208 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, two hundred eight".