11725711321 has 2 divisors, whose sum is σ = 11725711322. Its totient is φ = 11725711320.

The previous prime is 11725711279. The next prime is 11725711337. The reversal of 11725711321 is 12311752711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8251905600 + 3473805721 = 90840^2 + 58939^2 .

It is an emirp because it is prime and its reverse (12311752711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11725711321 - 2⁹ = 11725710809 is a prime.

It is not a weakly prime, because it can be changed into another prime (11725711381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5862855660 + 5862855661.

It is an arithmetic number, because the mean of its divisors is an integer number (5862855661).

Almost surely, 2^11725711321 is an apocalyptic number.

It is an amenable number.

11725711321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11725711321 is an equidigital number, since it uses as much as digits as its factorization.

11725711321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 31.

The spelling of 11725711321 in words is "eleven billion, seven hundred twenty-five million, seven hundred eleven thousand, three hundred twenty-one".