203149121 has 16 divisors (see below), whose sum is σ = 244992000. Its totient is φ = 164557008.

The previous prime is 203149117. The next prime is 203149123. The reversal of 203149121 is 121941302.

203149121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203149121 - 2² = 203149117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203149123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59930 + ... + 63228.

It is an arithmetic number, because the mean of its divisors is an integer number (15312000).

Almost surely, 2^203149121 is an apocalyptic number.

It is an amenable number.

203149121 is a deficient number, since it is larger than the sum of its proper divisors (41842879).

203149121 is a wasteful number, since it uses less digits than its factorization.

203149121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 203149121 is about 14253.0390092780. The cubic root of 203149121 is about 587.8569393350.

The spelling of 203149121 in words is "two hundred three million, one hundred forty-nine thousand, one hundred twenty-one".