131020443431243 has 2 divisors, whose sum is σ = 131020443431244. Its totient is φ = 131020443431242.

The previous prime is 131020443431231. The next prime is 131020443431299. The reversal of 131020443431243 is 342134344020131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131020443431243 - 2⁶ = 131020443431179 is a prime.

It is not a weakly prime, because it can be changed into another prime (131020443430243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65510221715621 + 65510221715622.

It is an arithmetic number, because the mean of its divisors is an integer number (65510221715622).

Almost surely, 2^{131020443431243} is an apocalyptic number.

131020443431243 is a deficient number, since it is larger than the sum of its proper divisors (1).

131020443431243 is an equidigital number, since it uses as much as digits as its factorization.

131020443431243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 131020443431243 its reverse (342134344020131), we get a palindrome (473154787451374).

The spelling of 131020443431243 in words is "one hundred thirty-one trillion, twenty billion, four hundred forty-three million, four hundred thirty-one thousand, two hundred forty-three".