131121304513523 has 2 divisors, whose sum is σ = 131121304513524. Its totient is φ = 131121304513522.

The previous prime is 131121304513499. The next prime is 131121304513627. The reversal of 131121304513523 is 325315403121131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131121304513523 - 2²⁰ = 131121303464947 is a prime.

It is not a weakly prime, because it can be changed into another prime (131121304513123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560652256761 + 65560652256762.

It is an arithmetic number, because the mean of its divisors is an integer number (65560652256762).

Almost surely, 2^{131121304513523} is an apocalyptic number.

131121304513523 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121304513523 is an equidigital number, since it uses as much as digits as its factorization.

131121304513523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 131121304513523 its reverse (325315403121131), we get a palindrome (456436707634654).

The spelling of 131121304513523 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred four million, five hundred thirteen thousand, five hundred twenty-three".