203231121 has 8 divisors (see below), whose sum is σ = 278298624. Its totient is φ = 131825520.

The previous prime is 203231117. The next prime is 203231153. The reversal of 203231121 is 121132302.

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

It is not a de Polignac number, because 203231121 - 2² = 203231117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203231121.

It is not an unprimeable number, because it can be changed into a prime (203211121) 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, 915345 + ... + 915566.

It is an arithmetic number, because the mean of its divisors is an integer number (34787328).

Almost surely, 2^203231121 is an apocalyptic number.

It is an amenable number.

203231121 is a deficient number, since it is larger than the sum of its proper divisors (75067503).

203231121 is a wasteful number, since it uses less digits than its factorization.

203231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830951.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 203231121 is about 14255.9152985699. The cubic root of 203231121 is about 587.9360237442.

Adding to 203231121 its reverse (121132302), we get a palindrome (324363423).

It can be divided in two parts, 2032 and 31121, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 203231121 in words is "two hundred three million, two hundred thirty-one thousand, one hundred twenty-one".