200121220120212 has 36 divisors (see below), whose sum is σ = 510870507477876. Its totient is φ = 66046607299200.

The previous prime is 200121220120193. The next prime is 200121220120259. The reversal of 200121220120212 is 212021022121002.

It is a happy number.

200121220120212 is a `hidden beast` number, since 20 + 0 + 1 + 212 + 201 + 20 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 189002169813636 + 11119050306576 = 13747806^2 + 3334524^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27519416073 + ... + 27519423344.

It is an arithmetic number, because the mean of its divisors is an integer number (14190847429941).

Almost surely, 2^{200121220120212} is an apocalyptic number.

It is an amenable number.

200121220120212 is an abundant number, since it is smaller than the sum of its proper divisors (310749287357664).

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

200121220120212 is a wasteful number, since it uses less digits than its factorization.

200121220120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55038839528 (or 55038839523 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 200121220120212 its reverse (212021022121002), we get a palindrome (412142242241214).

The spelling of 200121220120212 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred twelve".