131231211232331 has 8 divisors (see below), whose sum is σ = 149988780779520. Its totient is φ = 112476205099368.

The previous prime is 131231211232279. The next prime is 131231211232333. The reversal of 131231211232331 is 133232112132131.

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 131231211232331 - 2¹⁸ = 131231210970187 is a prime.

It is a super-2 number, since 2×131231211232331² (a number of 29 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 = 131231211232294 and 131231211232303.

It is not an unprimeable number, because it can be changed into a prime (131231211232333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640743851 + ... + 640948628.

It is an arithmetic number, because the mean of its divisors is an integer number (18748597597440).

Almost surely, 2^{131231211232331} is an apocalyptic number.

131231211232331 is a deficient number, since it is larger than the sum of its proper divisors (18757569547189).

131231211232331 is a wasteful number, since it uses less digits than its factorization.

131231211232331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281707113.

The product of its digits is 3888, while the sum is 29.

Adding to 131231211232331 its reverse (133232112132131), we get a palindrome (264463323364462).

The spelling of 131231211232331 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, two hundred eleven million, two hundred thirty-two thousand, three hundred thirty-one".