200121212120 has 32 divisors (see below), whose sum is σ = 451245280320. Its totient is φ = 79875586560.

The previous prime is 200121212041. The next prime is 200121212147. The reversal of 200121212120 is 21212121002.

200121212120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 200121212095 and 200121212104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5384321 + ... + 5421360.

It is an arithmetic number, because the mean of its divisors is an integer number (14101415010).

Almost surely, 2^200121212120 is an apocalyptic number.

200121212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121212120 is an abundant number, since it is smaller than the sum of its proper divisors (251124068200).

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

200121212120 is a wasteful number, since it uses less digits than its factorization.

200121212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806155 (or 10806151 counting only the distinct ones).

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

Adding to 200121212120 its reverse (21212121002), we get a palindrome (221333333122).

The spelling of 200121212120 in words is "two hundred billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty".