131220032857897 has 2 divisors, whose sum is σ = 131220032857898. Its totient is φ = 131220032857896.

The previous prime is 131220032857891. The next prime is 131220032857967. The reversal of 131220032857897 is 798758230022131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131218376693481 + 1656164416 = 11455059^2 + 40696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131220032857897 is a prime.

It is not a weakly prime, because it can be changed into another prime (131220032857891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610016428948 + 65610016428949.

It is an arithmetic number, because the mean of its divisors is an integer number (65610016428949).

Almost surely, 2^{131220032857897} is an apocalyptic number.

It is an amenable number.

131220032857897 is a deficient number, since it is larger than the sum of its proper divisors (1).

131220032857897 is an equidigital number, since it uses as much as digits as its factorization.

131220032857897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 131220032857897 in words is "one hundred thirty-one trillion, two hundred twenty billion, thirty-two million, eight hundred fifty-seven thousand, eight hundred ninety-seven".