131223131123 has 8 divisors (see below), whose sum is σ = 150016731648. Its totient is φ = 112441390344.

The previous prime is 131223131119. The next prime is 131223131129. The reversal of 131223131123 is 321131322131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131223131123 - 2² = 131223131119 is a prime.

It is a super-2 number, since 2×131223131123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131223131129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2941211 + ... + 2985492.

It is an arithmetic number, because the mean of its divisors is an integer number (18752091456).

Almost surely, 2^131223131123 is an apocalyptic number.

131223131123 is a deficient number, since it is larger than the sum of its proper divisors (18793600525).

131223131123 is an equidigital number, since it uses as much as digits as its factorization.

131223131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5929873.

The product of its digits is 648, while the sum is 23.

Adding to 131223131123 its reverse (321131322131), we get a palindrome (452354453254).

The spelling of 131223131123 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-three".