203231111023 has 4 divisors (see below), whose sum is σ = 203396475240. Its totient is φ = 203065746808.

The previous prime is 203231111009. The next prime is 203231111033. The reversal of 203231111023 is 320111132302.

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 203231111023 - 2¹⁷ = 203230979951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203231111033) 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, 82680265 + ... + 82682722.

It is an arithmetic number, because the mean of its divisors is an integer number (50849118810).

Almost surely, 2^203231111023 is an apocalyptic number.

203231111023 is a deficient number, since it is larger than the sum of its proper divisors (165364217).

203231111023 is a wasteful number, since it uses less digits than its factorization.

203231111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165364216.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203231111023 its reverse (320111132302), we get a palindrome (523342243325).

The spelling of 203231111023 in words is "two hundred three billion, two hundred thirty-one million, one hundred eleven thousand, twenty-three".