200121121100 has 72 divisors (see below), whose sum is σ = 435419870928. Its totient is φ = 79835500800.

The previous prime is 200121121087. The next prime is 200121121157. The reversal of 200121121100 is 1121121002.

200121121100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×200121121100² (a number of 23 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 114550427 + ... + 114552173.

Almost surely, 2^200121121100 is an apocalyptic number.

200121121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121121100 is an abundant number, since it is smaller than the sum of its proper divisors (235298749828).

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

200121121100 is a wasteful number, since it uses less digits than its factorization.

200121121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155 (or 4148 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200121121100 its reverse (1121121002), we get a palindrome (201242242102).

The spelling of 200121121100 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred".