200121450 has 48 divisors (see below), whose sum is σ = 525502080. Its totient is φ = 50225920.

The previous prime is 200121421. The next prime is 200121479. The reversal of 200121450 is 54121002.

It is an interprime number because it is at equal distance from previous prime (200121421) and next prime (200121479).

It is a Harshad number since it is a multiple of its sum of digits (15).

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 23 ways as a sum of consecutive naturals, for example, 36690 + ... + 41789.

It is an arithmetic number, because the mean of its divisors is an integer number (10947960).

Almost surely, 2^200121450 is an apocalyptic number.

200121450 is an abundant number, since it is smaller than the sum of its proper divisors (325380630).

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

200121450 is a wasteful number, since it uses less digits than its factorization.

200121450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78511 (or 78506 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 200121450 is about 14146.4288779890. The cubic root of 200121450 is about 584.9218976746.

Adding to 200121450 its reverse (54121002), we get a palindrome (254242452).

The spelling of 200121450 in words is "two hundred million, one hundred twenty-one thousand, four hundred fifty".