2131123023343 has 4 divisors (see below), whose sum is σ = 2131398334408. Its totient is φ = 2130847712280.

The previous prime is 2131123023257. The next prime is 2131123023377. The reversal of 2131123023343 is 3433203211312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131123023343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131123024343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137643921 + ... + 137659402.

It is an arithmetic number, because the mean of its divisors is an integer number (532849583602).

Almost surely, 2^{2131123023343} is an apocalyptic number.

2131123023343 is a deficient number, since it is larger than the sum of its proper divisors (275311065).

2131123023343 is an equidigital number, since it uses as much as digits as its factorization.

2131123023343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275311064.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 2131123023343 its reverse (3433203211312), we get a palindrome (5564326234655).

The spelling of 2131123023343 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-three million, twenty-three thousand, three hundred forty-three".