20113131203103 has 4 divisors (see below), whose sum is σ = 26817508270808. Its totient is φ = 13408754135400.

The previous prime is 20113131203089. The next prime is 20113131203149. The reversal of 20113131203103 is 30130213131102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20113131203103 - 2²⁵ = 20113097648671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20113131203103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113131203603) 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, 3352188533848 + ... + 3352188533853.

It is an arithmetic number, because the mean of its divisors is an integer number (6704377067702).

Almost surely, 2^{20113131203103} is an apocalyptic number.

20113131203103 is a deficient number, since it is larger than the sum of its proper divisors (6704377067705).

20113131203103 is an equidigital number, since it uses as much as digits as its factorization.

20113131203103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704377067704.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 20113131203103 its reverse (30130213131102), we get a palindrome (50243344334205).

The spelling of 20113131203103 in words is "twenty trillion, one hundred thirteen billion, one hundred thirty-one million, two hundred three thousand, one hundred three".