131020331220321 has 16 divisors (see below), whose sum is σ = 177524092661760. Its totient is φ = 85936865324240.

The previous prime is 131020331220277. The next prime is 131020331220397. The reversal of 131020331220321 is 123022133020131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131020331220321 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131020331220291 and 131020331220300.

It is not an unprimeable number, because it can be changed into a prime (131020331220221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641984535 + ... + 642188588.

It is an arithmetic number, because the mean of its divisors is an integer number (11095255791360).

Almost surely, 2^{131020331220321} is an apocalyptic number.

It is an amenable number.

131020331220321 is a deficient number, since it is larger than the sum of its proper divisors (46503761441439).

131020331220321 is a wasteful number, since it uses less digits than its factorization.

131020331220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284173676.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 131020331220321 its reverse (123022133020131), we get a palindrome (254042464240452).

The spelling of 131020331220321 in words is "one hundred thirty-one trillion, twenty billion, three hundred thirty-one million, two hundred twenty thousand, three hundred twenty-one".