131322212321 has 4 divisors (see below), whose sum is σ = 135850564500. Its totient is φ = 126793860144.

The previous prime is 131322212309. The next prime is 131322212327. The reversal of 131322212321 is 123212223131.

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 72740787025 + 58581425296 = 269705^2 + 242036^2 .

It is a cyclic number.

It is not a de Polignac number, because 131322212321 - 2⁶ = 131322212257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131322212327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264176046 + ... + 2264176103.

It is an arithmetic number, because the mean of its divisors is an integer number (33962641125).

Almost surely, 2^131322212321 is an apocalyptic number.

It is an amenable number.

131322212321 is a deficient number, since it is larger than the sum of its proper divisors (4528352179).

131322212321 is an equidigital number, since it uses as much as digits as its factorization.

131322212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528352178.

The product of its digits is 864, while the sum is 23.

Adding to 131322212321 its reverse (123212223131), we get a palindrome (254534435452).

The spelling of 131322212321 in words is "one hundred thirty-one billion, three hundred twenty-two million, two hundred twelve thousand, three hundred twenty-one".