200121220112 has 160 divisors (see below), whose sum is σ = 442621670400. Its totient is φ = 86819443200.

The previous prime is 200121220111. The next prime is 200121220127. The reversal of 200121220112 is 211022121002.

It is not an unprimeable number, because it can be changed into a prime (200121220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220640363 + ... + 220641269.

It is an arithmetic number, because the mean of its divisors is an integer number (2766385440).

Almost surely, 2^200121220112 is an apocalyptic number.

200121220112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200121220112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221310835200).

200121220112 is an abundant number, since it is smaller than the sum of its proper divisors (242500450288).

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

200121220112 is a wasteful number, since it uses less digits than its factorization.

200121220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200121220112 its reverse (211022121002), we get a palindrome (411143341114).

The spelling of 200121220112 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twelve".