131342430201821 has 2 divisors, whose sum is σ = 131342430201822. Its totient is φ = 131342430201820.

The previous prime is 131342430201797. The next prime is 131342430201907. The reversal of 131342430201821 is 128102034243131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130138220258596 + 1204209943225 = 11407814^2 + 1097365^2 .

It is a cyclic number.

It is not a de Polignac number, because 131342430201821 - 2³⁰ = 131341356459997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131342430206821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65671215100910 + 65671215100911.

It is an arithmetic number, because the mean of its divisors is an integer number (65671215100911).

Almost surely, 2^{131342430201821} is an apocalyptic number.

It is an amenable number.

131342430201821 is a deficient number, since it is larger than the sum of its proper divisors (1).

131342430201821 is an equidigital number, since it uses as much as digits as its factorization.

131342430201821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 131342430201821 its reverse (128102034243131), we get a palindrome (259444464444952).

The spelling of 131342430201821 in words is "one hundred thirty-one trillion, three hundred forty-two billion, four hundred thirty million, two hundred one thousand, eight hundred twenty-one".