212121200200220 has 24 divisors (see below), whose sum is σ = 445592989477104. Its totient is φ = 84822105021696.

The previous prime is 212121200200199. The next prime is 212121200200267. The reversal of 212121200200220 is 22002002121212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648375202 + ... + 1648503881.

It is an arithmetic number, because the mean of its divisors is an integer number (18566374561546).

Almost surely, 2^{212121200200220} is an apocalyptic number.

212121200200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121200200220 is an abundant number, since it is smaller than the sum of its proper divisors (233471789276884).

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

212121200200220 is a wasteful number, since it uses less digits than its factorization.

212121200200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296882309 (or 3296882307 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212121200200220 its reverse (22002002121212), we get a palindrome (234123202321432).

The spelling of 212121200200220 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred million, two hundred thousand, two hundred twenty".