203123004031 has 2 divisors, whose sum is σ = 203123004032. Its totient is φ = 203123004030.

The previous prime is 203123004023. The next prime is 203123004127. The reversal of 203123004031 is 130400321302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203123004031 - 2³ = 203123004023 is a prime.

It is a super-2 number, since 2×203123004031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203123004001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561502015 + 101561502016.

It is an arithmetic number, because the mean of its divisors is an integer number (101561502016).

Almost surely, 2^203123004031 is an apocalyptic number.

203123004031 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123004031 is an equidigital number, since it uses as much as digits as its factorization.

203123004031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203123004031 its reverse (130400321302), we get a palindrome (333523325333).

The spelling of 203123004031 in words is "two hundred three billion, one hundred twenty-three million, four thousand, thirty-one".