131022334721 has 2 divisors, whose sum is σ = 131022334722. Its totient is φ = 131022334720.

The previous prime is 131022334699. The next prime is 131022334753. The reversal of 131022334721 is 127433220131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127992933121 + 3029401600 = 357761^2 + 55040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131022334721 is a prime.

It is not a weakly prime, because it can be changed into another prime (131022324721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65511167360 + 65511167361.

It is an arithmetic number, because the mean of its divisors is an integer number (65511167361).

Almost surely, 2^131022334721 is an apocalyptic number.

It is an amenable number.

131022334721 is a deficient number, since it is larger than the sum of its proper divisors (1).

131022334721 is an equidigital number, since it uses as much as digits as its factorization.

131022334721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 131022334721 its reverse (127433220131), we get a palindrome (258455554852).

The spelling of 131022334721 in words is "one hundred thirty-one billion, twenty-two million, three hundred thirty-four thousand, seven hundred twenty-one".