131220502350521 has 16 divisors (see below), whose sum is σ = 134727446515200. Its totient is φ = 127734949859328.

The previous prime is 131220502350481. The next prime is 131220502350557. The reversal of 131220502350521 is 125053205022131.

It is a cyclic number.

It is not a de Polignac number, because 131220502350521 - 2³⁸ = 130945624443577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131220502370521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11696795 + ... + 19981391.

It is an arithmetic number, because the mean of its divisors is an integer number (8420465407200).

Almost surely, 2^{131220502350521} is an apocalyptic number.

It is an amenable number.

131220502350521 is a deficient number, since it is larger than the sum of its proper divisors (3506944164679).

131220502350521 is an equidigital number, since it uses as much as digits as its factorization.

131220502350521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285888.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 131220502350521 its reverse (125053205022131), we get a palindrome (256273707372652).

The spelling of 131220502350521 in words is "one hundred thirty-one trillion, two hundred twenty billion, five hundred two million, three hundred fifty thousand, five hundred twenty-one".