It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
Almost surely, 2131143134323431 is an apocalyptic number.
131143134323431 is an equidigital number, since it uses as much as digits as its factorization.
131143134323431 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6902270227568.
Adding to 131143134323431 its reverse (134323431341131), we get a palindrome (265466565664562).
The spelling of 131143134323431 in words is "one hundred thirty-one trillion, one hundred forty-three billion, one hundred thirty-four million, three hundred twenty-three thousand, four hundred thirty-one".