200121030 has 80 divisors (see below), whose sum is σ = 543367440. Its totient is φ = 52843968.

The previous prime is 200121023. The next prime is 200121043. The reversal of 200121030 is 30121002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 85516 + ... + 87824.

It is an arithmetic number, because the mean of its divisors is an integer number (6792093).

Almost surely, 2^200121030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200121030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271683720).

200121030 is an abundant number, since it is smaller than the sum of its proper divisors (343246410).

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

200121030 is a wasteful number, since it uses less digits than its factorization.

200121030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2426 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 200121030 is about 14146.4140332453. The cubic root of 200121030 is about 584.9214884774.

Adding to 200121030 its reverse (30121002), we get a palindrome (230242032).

The spelling of 200121030 in words is "two hundred million, one hundred twenty-one thousand, thirty".