203200121 has 4 divisors (see below), whose sum is σ = 203245812. Its totient is φ = 203154432.

The previous prime is 203200097. The next prime is 203200139. The reversal of 203200121 is 121002302.

It is a happy number.

203200121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25351225 + 177848896 = 5035^2 + 13336^2 .

It is a cyclic number.

It is not a de Polignac number, because 203200121 - 2¹⁰ = 203199097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203200171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15356 + ... + 25341.

It is an arithmetic number, because the mean of its divisors is an integer number (50811453).

Almost surely, 2^203200121 is an apocalyptic number.

It is an amenable number.

203200121 is a deficient number, since it is larger than the sum of its proper divisors (45691).

203200121 is an equidigital number, since it uses as much as digits as its factorization.

203200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45690.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 203200121 is about 14254.8279891411. The cubic root of 203200121 is about 587.9061284811.

Adding to 203200121 its reverse (121002302), we get a palindrome (324202423).

The spelling of 203200121 in words is "two hundred three million, two hundred thousand, one hundred twenty-one".