200121312 has 48 divisors (see below), whose sum is σ = 537546240. Its totient is φ = 65154432.

The previous prime is 200121247. The next prime is 200121329. The reversal of 200121312 is 213121002.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 7 ways as a sum of consecutive naturals, for example, 20112 + ... + 28367.

It is an arithmetic number, because the mean of its divisors is an integer number (11198880).

Almost surely, 2^200121312 is an apocalyptic number.

It is an amenable number.

200121312 is an abundant number, since it is smaller than the sum of its proper divisors (337424928).

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

200121312 is a wasteful number, since it uses less digits than its factorization.

200121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48535 (or 48527 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 200121312 is about 14146.4240004321. The cubic root of 200121312 is about 584.9217632241.

Adding to 200121312 its reverse (213121002), we get a palindrome (413242314).

The spelling of 200121312 in words is "two hundred million, one hundred twenty-one thousand, three hundred twelve".