131233433320421 has 2 divisors, whose sum is σ = 131233433320422. Its totient is φ = 131233433320420.

The previous prime is 131233433320417. The next prime is 131233433320463. The reversal of 131233433320421 is 124023334332131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78669555811396 + 52563877509025 = 8869586^2 + 7250095^2 .

It is a cyclic number.

It is not a de Polignac number, because 131233433320421 - 2² = 131233433320417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131233433320471) 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, 65616716660210 + 65616716660211.

It is an arithmetic number, because the mean of its divisors is an integer number (65616716660211).

Almost surely, 2^{131233433320421} is an apocalyptic number.

It is an amenable number.

131233433320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131233433320421 is an equidigital number, since it uses as much as digits as its factorization.

131233433320421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 131233433320421 its reverse (124023334332131), we get a palindrome (255256767652552).

The spelling of 131233433320421 in words is "one hundred thirty-one trillion, two hundred thirty-three billion, four hundred thirty-three million, three hundred twenty thousand, four hundred twenty-one".