203103121 has 8 divisors (see below), whose sum is σ = 223380864. Its totient is φ = 183490320.

The previous prime is 203103119. The next prime is 203103137. The reversal of 203103121 is 121301302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203103121 - 2¹ = 203103119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203103151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165595 + ... + 166816.

It is an arithmetic number, because the mean of its divisors is an integer number (27922608).

Almost surely, 2^203103121 is an apocalyptic number.

It is an amenable number.

203103121 is a deficient number, since it is larger than the sum of its proper divisors (20277743).

203103121 is a wasteful number, since it uses less digits than its factorization.

203103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332471.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 203103121 is about 14251.4252269729. The cubic root of 203103121 is about 587.8125655922.

Adding to 203103121 its reverse (121301302), we get a palindrome (324404423).

The spelling of 203103121 in words is "two hundred three million, one hundred three thousand, one hundred twenty-one".