200121220212012 has 72 divisors (see below), whose sum is σ = 551853860659920. Its totient is φ = 60642306616320.

The previous prime is 200121220211993. The next prime is 200121220212013. The reversal of 200121220212012 is 210212022121002.

It is a happy number.

200121220212012 is a `hidden beast` number, since 200 + 1 + 21 + 220 + 21 + 201 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (200121220212013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48915108 + ... + 52848180.

It is an arithmetic number, because the mean of its divisors is an integer number (7664636953610).

Almost surely, 2^{200121220212012} is an apocalyptic number.

200121220212012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

200121220212012 is an abundant number, since it is smaller than the sum of its proper divisors (351732640447908).

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

200121220212012 is a wasteful number, since it uses less digits than its factorization.

200121220212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061583 (or 4061578 counting only the distinct ones).

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

Adding to 200121220212012 its reverse (210212022121002), we get a palindrome (410333242333014).

The spelling of 200121220212012 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, twelve".