2131113123 has 6 divisors (see below), whose sum is σ = 3078274524. Its totient is φ = 1420742076.

The previous prime is 2131113121. The next prime is 2131113221. The reversal of 2131113123 is 3213111312.

It is not a de Polignac number, because 2131113123 - 2¹ = 2131113121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131113096 and 2131113105.

It is not an unprimeable number, because it can be changed into a prime (2131113121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118395165 + ... + 118395182.

It is an arithmetic number, because the mean of its divisors is an integer number (513045754).

Almost surely, 2^2131113123 is an apocalyptic number.

2131113123 is a deficient number, since it is larger than the sum of its proper divisors (947161401).

2131113123 is a wasteful number, since it uses less digits than its factorization.

2131113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236790353 (or 236790350 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2131113123 is about 46163.9807967207. The cubic root of 2131113123 is about 1286.8724433144.

Adding to 2131113123 its reverse (3213111312), we get a palindrome (5344224435).

It can be divided in two parts, 213111312 and 3, that multiplied together give a palindrome (639333936).

The spelling of 2131113123 in words is "two billion, one hundred thirty-one million, one hundred thirteen thousand, one hundred twenty-three".