2131303123 has 4 divisors (see below), whose sum is σ = 2183286168. Its totient is φ = 2079320080.

The previous prime is 2131303121. The next prime is 2131303157. The reversal of 2131303123 is 3213031312.

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 2131303123 - 2¹ = 2131303121 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 2131303123.

It is not an unprimeable number, because it can be changed into a prime (2131303121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25991461 + ... + 25991542.

It is an arithmetic number, because the mean of its divisors is an integer number (545821542).

Almost surely, 2^2131303123 is an apocalyptic number.

2131303123 is a deficient number, since it is larger than the sum of its proper divisors (51983045).

2131303123 is an equidigital number, since it uses as much as digits as its factorization.

2131303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51983044.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2131303123 is about 46166.0386323107. The cubic root of 2131303123 is about 1286.9106860049.

Adding to 2131303123 its reverse (3213031312), we get a palindrome (5344334435).

The spelling of 2131303123 in words is "two billion, one hundred thirty-one million, three hundred three thousand, one hundred twenty-three".