212120022100 has 72 divisors (see below), whose sum is σ = 526184322048. Its totient is φ = 72709353600.

The previous prime is 212120022077. The next prime is 212120022143. The reversal of 212120022100 is 1220021212.

It is a happy number.

212120022100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3060429 + ... + 3128971.

It is an arithmetic number, because the mean of its divisors is an integer number (7308115584).

Almost surely, 2^212120022100 is an apocalyptic number.

212120022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120022100 is an abundant number, since it is smaller than the sum of its proper divisors (314064299948).

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

212120022100 is a wasteful number, since it uses less digits than its factorization.

212120022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72985 (or 72978 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212120022100 its reverse (1220021212), we get a palindrome (213340043312).

The spelling of 212120022100 in words is "two hundred twelve billion, one hundred twenty million, twenty-two thousand, one hundred".