131043236321 has 4 divisors (see below), whose sum is σ = 131708430612. Its totient is φ = 130378042032.

The previous prime is 131043236309. The next prime is 131043236347. The reversal of 131043236321 is 123632340131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123632340131 = 1193 ⋅103631467.

It can be written as a sum of positive squares in 2 ways, for example, as 95150039296 + 35893197025 = 308464^2 + 189455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131043236321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131043236521) 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, 332596850 + ... + 332597243.

It is an arithmetic number, because the mean of its divisors is an integer number (32927107653).

Almost surely, 2^131043236321 is an apocalyptic number.

It is an amenable number.

131043236321 is a deficient number, since it is larger than the sum of its proper divisors (665194291).

131043236321 is an equidigital number, since it uses as much as digits as its factorization.

131043236321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665194290.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 131043236321 its reverse (123632340131), we get a palindrome (254675576452).

The spelling of 131043236321 in words is "one hundred thirty-one billion, forty-three million, two hundred thirty-six thousand, three hundred twenty-one".