200121125 has 8 divisors (see below), whose sum is σ = 249751320. Its totient is φ = 160096800.

The previous prime is 200121113. The next prime is 200121169. The reversal of 200121125 is 521121002.

It can be written as a sum of positive squares in 4 ways, for example, as 2353156 + 197767969 = 1534^2 + 14063^2 .

It is not a de Polignac number, because 200121125 - 2⁴ = 200121109 is a prime.

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, 800360 + ... + 800609.

It is an arithmetic number, because the mean of its divisors is an integer number (31218915).

Almost surely, 2^200121125 is an apocalyptic number.

200121125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

200121125 is a deficient number, since it is larger than the sum of its proper divisors (49630195).

200121125 is an equidigital number, since it uses as much as digits as its factorization.

200121125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600984 (or 1600974 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 200121125 is about 14146.4173909863. The cubic root of 200121125 is about 584.9215810340.

Adding to 200121125 its reverse (521121002), we get a palindrome (721242127).

The spelling of 200121125 in words is "two hundred million, one hundred twenty-one thousand, one hundred twenty-five".