131211123323213 has 2 divisors, whose sum is σ = 131211123323214. Its totient is φ = 131211123323212.

The previous prime is 131211123323207. The next prime is 131211123323233. The reversal of 131211123323213 is 312323321112131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125258782296649 + 5952341026564 = 11191907^2 + 2439742^2 .

It is a cyclic number.

It is not a de Polignac number, because 131211123323213 - 2⁶ = 131211123323149 is a prime.

It is a super-3 number, since 3×131211123323213³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131211123323233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605561661606 + 65605561661607.

It is an arithmetic number, because the mean of its divisors is an integer number (65605561661607).

Almost surely, 2^{131211123323213} is an apocalyptic number.

It is an amenable number.

131211123323213 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211123323213 is an equidigital number, since it uses as much as digits as its factorization.

131211123323213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

Adding to 131211123323213 its reverse (312323321112131), we get a palindrome (443534444435344).

The spelling of 131211123323213 in words is "one hundred thirty-one trillion, two hundred eleven billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred thirteen".