131243212031321 has 8 divisors (see below), whose sum is σ = 141600098527944. Its totient is φ = 120923647649280.

The previous prime is 131243212031317. The next prime is 131243212031387. The reversal of 131243212031321 is 123130212342131.

It can be written as a sum of positive squares in 4 ways, for example, as 197131560025 + 131046080471296 = 443995^2 + 11447536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131243212031321 - 2² = 131243212031317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131243212031521) 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 7 ways as a sum of consecutive naturals, for example, 9330521336 + ... + 9330535401.

It is an arithmetic number, because the mean of its divisors is an integer number (17700012315993).

Almost surely, 2^{131243212031321} is an apocalyptic number.

It is an amenable number.

131243212031321 is a deficient number, since it is larger than the sum of its proper divisors (10356886496623).

131243212031321 is a wasteful number, since it uses less digits than its factorization.

131243212031321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18661057291.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 131243212031321 its reverse (123130212342131), we get a palindrome (254373424373452).

The spelling of 131243212031321 in words is "one hundred thirty-one trillion, two hundred forty-three billion, two hundred twelve million, thirty-one thousand, three hundred twenty-one".