212121200120212 has 12 divisors (see below), whose sum is σ = 371215635053620. Its totient is φ = 106059590104896.

The previous prime is 212121200120153. The next prime is 212121200120237. The reversal of 212121200120212 is 212021002121212.

It can be written as a sum of positive squares in 2 ways, for example, as 45104709728016 + 167016490392196 = 6716004^2 + 12923486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212121200120212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252016137 + ... + 252856432.

Almost surely, 2^{212121200120212} is an apocalyptic number.

It is an amenable number.

212121200120212 is a deficient number, since it is larger than the sum of its proper divisors (159094434933408).

212121200120212 is a wasteful number, since it uses less digits than its factorization.

212121200120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504977610 (or 504977608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212121200120212 its reverse (212021002121212), we get a palindrome (424142202241424).

The spelling of 212121200120212 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred million, one hundred twenty thousand, two hundred twelve".