212121101022200 has 48 divisors (see below), whose sum is σ = 493194624930000. Its totient is φ = 84846192657920.

The previous prime is 212121101022199. The next prime is 212121101022203. The reversal of 212121101022200 is 2220101121212.

It is a super-3 number, since 3×212121101022200³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121101022203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6469745 + ... + 21589344.

It is an arithmetic number, because the mean of its divisors is an integer number (10274888019375).

Almost surely, 2^{212121101022200} is an apocalyptic number.

212121101022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121101022200 is an abundant number, since it is smaller than the sum of its proper divisors (281073523907800).

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

212121101022200 is a wasteful number, since it uses less digits than its factorization.

212121101022200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28096904 (or 28096895 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212121101022200 its reverse (2220101121212), we get a palindrome (214341202143412).

The spelling of 212121101022200 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred one million, twenty-two thousand, two hundred".