203113123 has 4 divisors (see below), whose sum is σ = 207836728. Its totient is φ = 198389520.

The previous prime is 203113111. The next prime is 203113133. The reversal of 203113123 is 321311302.

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 203113123 - 2¹³ = 203104931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203113097 and 203113106.

It is not an unprimeable number, because it can be changed into a prime (203113133) 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, 2361738 + ... + 2361823.

It is an arithmetic number, because the mean of its divisors is an integer number (51959182).

Almost surely, 2^203113123 is an apocalyptic number.

203113123 is a deficient number, since it is larger than the sum of its proper divisors (4723605).

203113123 is an equidigital number, since it uses as much as digits as its factorization.

203113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723604.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 203113123 is about 14251.7761349244. The cubic root of 203113123 is about 587.8222145573.

Adding to 203113123 its reverse (321311302), we get a palindrome (524424425).

The spelling of 203113123 in words is "two hundred three million, one hundred thirteen thousand, one hundred twenty-three".