131321213231 has 12 divisors (see below), whose sum is σ = 142685271288. Its totient is φ = 120805817184.

The previous prime is 131321213209. The next prime is 131321213251. The reversal of 131321213231 is 132312123131.

It is not a de Polignac number, because 131321213231 - 2¹⁴ = 131321196847 is a prime.

It is a super-2 number, since 2×131321213231² (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 = 131321213197 and 131321213206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321213251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1276505 + ... + 1375538.

It is an arithmetic number, because the mean of its divisors is an integer number (11890439274).

Almost surely, 2^131321213231 is an apocalyptic number.

131321213231 is a deficient number, since it is larger than the sum of its proper divisors (11364058057).

131321213231 is a wasteful number, since it uses less digits than its factorization.

131321213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652362 (or 2652349 counting only the distinct ones).

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

Adding to 131321213231 its reverse (132312123131), we get a palindrome (263633336362).

The spelling of 131321213231 in words is "one hundred thirty-one billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-one".