131223131323 has 4 divisors (see below), whose sum is σ = 131239365840. Its totient is φ = 131206896808.

The previous prime is 131223131287. The next prime is 131223131341. The reversal of 131223131323 is 323131322131.

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 131223131323 - 2³³ = 122633196731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131223131363) 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, 8105128 + ... + 8121301.

It is an arithmetic number, because the mean of its divisors is an integer number (32809841460).

Almost surely, 2^131223131323 is an apocalyptic number.

131223131323 is a deficient number, since it is larger than the sum of its proper divisors (16234517).

131223131323 is an equidigital number, since it uses as much as digits as its factorization.

131223131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16234516.

The product of its digits is 1944, while the sum is 25.

Adding to 131223131323 its reverse (323131322131), we get a palindrome (454354453454).

The spelling of 131223131323 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty-three".