95566721321 has 2 divisors, whose sum is σ = 95566721322. Its totient is φ = 95566721320.

The previous prime is 95566721293. The next prime is 95566721339. The reversal of 95566721321 is 12312766559.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78267895696 + 17298825625 = 279764^2 + 131525^2 .

It is an emirp because it is prime and its reverse (12312766559) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-95566721321 is a prime.

It is not a weakly prime, because it can be changed into another prime (95566721351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47783360660 + 47783360661.

It is an arithmetic number, because the mean of its divisors is an integer number (47783360661).

Almost surely, 2^95566721321 is an apocalyptic number.

It is an amenable number.

95566721321 is a deficient number, since it is larger than the sum of its proper divisors (1).

95566721321 is an equidigital number, since it uses as much as digits as its factorization.

95566721321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The spelling of 95566721321 in words is "ninety-five billion, five hundred sixty-six million, seven hundred twenty-one thousand, three hundred twenty-one".