203103120113 has 4 divisors (see below), whose sum is σ = 203191007808. Its totient is φ = 203015232420.

The previous prime is 203103120091. The next prime is 203103120131. The reversal of 203103120113 is 311021301302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203103120113 - 2⁶ = 203103120049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203103120091 and 203103120100.

It is not an unprimeable number, because it can be changed into a prime (203103120193) 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, 43940381 + ... + 43945002.

It is an arithmetic number, because the mean of its divisors is an integer number (50797751952).

Almost surely, 2^203103120113 is an apocalyptic number.

It is an amenable number.

203103120113 is a deficient number, since it is larger than the sum of its proper divisors (87887695).

203103120113 is an equidigital number, since it uses as much as digits as its factorization.

203103120113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87887694.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 203103120113 its reverse (311021301302), we get a palindrome (514124421415).

The spelling of 203103120113 in words is "two hundred three billion, one hundred three million, one hundred twenty thousand, one hundred thirteen".