200121120 has 144 divisors (see below), whose sum is σ = 705100032. Its totient is φ = 51632640.

The previous prime is 200121113. The next prime is 200121169. The reversal of 200121120 is 21121002.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42399 + ... + 46881.

It is an arithmetic number, because the mean of its divisors is an integer number (4896528).

Almost surely, 2^200121120 is an apocalyptic number.

200121120 is a gapful number since it is divisible by the number (20) 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 200121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352550016).

200121120 is an abundant number, since it is smaller than the sum of its proper divisors (504978912).

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

200121120 is a wasteful number, since it uses less digits than its factorization.

200121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 200121120 is about 14146.4172142631. The cubic root of 200121120 is about 584.9215761626.

Adding to 200121120 its reverse (21121002), we get a palindrome (221242122).

The spelling of 200121120 in words is "two hundred million, one hundred twenty-one thousand, one hundred twenty".