203123312003 has 2 divisors, whose sum is σ = 203123312004. Its totient is φ = 203123312002.

The previous prime is 203123311901. The next prime is 203123312009. The reversal of 203123312003 is 300213321302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203123312003 - 2¹⁸ = 203123049859 is a prime.

It is not a weakly prime, because it can be changed into another prime (203123312009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561656001 + 101561656002.

It is an arithmetic number, because the mean of its divisors is an integer number (101561656002).

Almost surely, 2^203123312003 is an apocalyptic number.

203123312003 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123312003 is an equidigital number, since it uses as much as digits as its factorization.

203123312003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 203123312003 its reverse (300213321302), we get a palindrome (503336633305).

The spelling of 203123312003 in words is "two hundred three billion, one hundred twenty-three million, three hundred twelve thousand, three".