200021121121212 has 84 divisors (see below), whose sum is σ = 524821880831136. Its totient is φ = 66672878967360.

The previous prime is 200021121121207. The next prime is 200021121121249. The reversal of 200021121121212 is 212121121120002.

200021121121212 is a `hidden beast` number, since 20 + 0 + 0 + 211 + 211 + 212 + 12 = 666.

It is a super-2 number, since 2×200021121121212² (a number of 29 digits) contains 22 as substring.

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 (31) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 262149448 + ... + 262911344.

It is an arithmetic number, because the mean of its divisors is an integer number (6247879533704).

Almost surely, 2^{200021121121212} is an apocalyptic number.

It is an amenable number.

200021121121212 is an abundant number, since it is smaller than the sum of its proper divisors (324800759709924).

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

200021121121212 is an equidigital number, since it uses as much as digits as its factorization.

200021121121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851950 (or 851933 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 200021121121212 its reverse (212121121120002), we get a palindrome (412142242241214).

The spelling of 200021121121212 in words is "two hundred trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".