212121111108 has 24 divisors (see below), whose sum is σ = 495007638048. Its totient is φ = 70698697216.

The previous prime is 212121111107. The next prime is 212121111151. The reversal of 212121111108 is 801111121212.

212121111108 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (212121111107) 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, 936066 + ... + 1140377.

It is an arithmetic number, because the mean of its divisors is an integer number (20625318252).

Almost surely, 2^212121111108 is an apocalyptic number.

It is an amenable number.

212121111108 is an abundant number, since it is smaller than the sum of its proper divisors (282886526940).

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

212121111108 is a wasteful number, since it uses less digits than its factorization.

212121111108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084963 (or 2084961 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 21.

The spelling of 212121111108 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, one hundred eight".