131223124231 has 8 divisors (see below), whose sum is σ = 133738940160. Its totient is φ = 128723698488.

The previous prime is 131223124229. The next prime is 131223124243. The reversal of 131223124231 is 132421322131.

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 131223124231 - 2¹ = 131223124229 is a prime.

It is a super-2 number, since 2×131223124231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131223124196 and 131223124205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223124211) 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, 4081381 + ... + 4113406.

It is an arithmetic number, because the mean of its divisors is an integer number (16717367520).

Almost surely, 2^131223124231 is an apocalyptic number.

131223124231 is a deficient number, since it is larger than the sum of its proper divisors (2515815929).

131223124231 is an equidigital number, since it uses as much as digits as its factorization.

131223124231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195093.

The product of its digits is 1728, while the sum is 25.

Adding to 131223124231 its reverse (132421322131), we get a palindrome (263644446362).

The spelling of 131223124231 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred twenty-four thousand, two hundred thirty-one".