212102021200 has 60 divisors (see below), whose sum is σ = 527146690140. Its totient is φ = 81915258880.

The previous prime is 212102021137. The next prime is 212102021213. The reversal of 212102021200 is 2120201212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 40749074496 + 171352946704 = 201864^2 + 413948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9130729 + ... + 9153928.

It is an arithmetic number, because the mean of its divisors is an integer number (8785778169).

Almost surely, 2^212102021200 is an apocalyptic number.

212102021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102021200 is an abundant number, since it is smaller than the sum of its proper divisors (315044668940).

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

212102021200 is a wasteful number, since it uses less digits than its factorization.

212102021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18284704 (or 18284693 counting only the distinct ones).

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

Adding to 212102021200 its reverse (2120201212), we get a palindrome (214222222412).

The spelling of 212102021200 in words is "two hundred twelve billion, one hundred two million, twenty-one thousand, two hundred".