203123010203 has 4 divisors (see below), whose sum is σ = 203667576288. Its totient is φ = 202578444120.

The previous prime is 203123010169. The next prime is 203123010217. The reversal of 203123010203 is 302010321302.

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

It is a cyclic number.

It is not a de Polignac number, because 203123010203 - 2¹⁰ = 203123009179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203123010403) 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, 272282483 + ... + 272283228.

It is an arithmetic number, because the mean of its divisors is an integer number (50916894072).

Almost surely, 2^203123010203 is an apocalyptic number.

203123010203 is a deficient number, since it is larger than the sum of its proper divisors (544566085).

203123010203 is an equidigital number, since it uses as much as digits as its factorization.

203123010203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544566084.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 203123010203 its reverse (302010321302), we get a palindrome (505133331505).

The spelling of 203123010203 in words is "two hundred three billion, one hundred twenty-three million, ten thousand, two hundred three".