131003231321 has 4 divisors (see below), whose sum is σ = 131060969700. Its totient is φ = 130945492944.

The previous prime is 131003231279. The next prime is 131003231357. The reversal of 131003231321 is 123132300131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60547492096 + 70455739225 = 246064^2 + 265435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131003231321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131003231293 and 131003231302.

It is not an unprimeable number, because it can be changed into a prime (131003231221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28865786 + ... + 28870323.

It is an arithmetic number, because the mean of its divisors is an integer number (32765242425).

Almost surely, 2^131003231321 is an apocalyptic number.

It is an amenable number.

131003231321 is a deficient number, since it is larger than the sum of its proper divisors (57738379).

131003231321 is an equidigital number, since it uses as much as digits as its factorization.

131003231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57738378.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131003231321 its reverse (123132300131), we get a palindrome (254135531452).

The spelling of 131003231321 in words is "one hundred thirty-one billion, three million, two hundred thirty-one thousand, three hundred twenty-one".