2131333123 has 4 divisors (see below), whose sum is σ = 2138142808. Its totient is φ = 2124523440.

The previous prime is 2131333121. The next prime is 2131333159. The reversal of 2131333123 is 3213331312.

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 2131333123 - 2¹ = 2131333121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131333094 and 2131333103.

It is not an unprimeable number, because it can be changed into a prime (2131333121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3404373 + ... + 3404998.

It is an arithmetic number, because the mean of its divisors is an integer number (534535702).

Almost surely, 2^2131333123 is an apocalyptic number.

2131333123 is a deficient number, since it is larger than the sum of its proper divisors (6809685).

2131333123 is an equidigital number, since it uses as much as digits as its factorization.

2131333123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809684.

The product of its digits is 972, while the sum is 22.

The square root of 2131333123 is about 46166.3635453346. The cubic root of 2131333123 is about 1286.9167241166.

Adding to 2131333123 its reverse (3213331312), we get a palindrome (5344664435).

The spelling of 2131333123 in words is "two billion, one hundred thirty-one million, three hundred thirty-three thousand, one hundred twenty-three".