131321210243 has 2 divisors, whose sum is σ = 131321210244. Its totient is φ = 131321210242.

The previous prime is 131321210203. The next prime is 131321210269. The reversal of 131321210243 is 342012123131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131321210243 - 2¹⁰ = 131321209219 is a prime.

It is not a weakly prime, because it can be changed into another prime (131321210203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660605121 + 65660605122.

It is an arithmetic number, because the mean of its divisors is an integer number (65660605122).

Almost surely, 2^131321210243 is an apocalyptic number.

131321210243 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321210243 is an equidigital number, since it uses as much as digits as its factorization.

131321210243 is an odious number, because the sum of its binary digits is odd.

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

Adding to 131321210243 its reverse (342012123131), we get a palindrome (473333333374).

The spelling of 131321210243 in words is "one hundred thirty-one billion, three hundred twenty-one million, two hundred ten thousand, two hundred forty-three".