11521304117 has 2 divisors, whose sum is σ = 11521304118. Its totient is φ = 11521304116.

The previous prime is 11521304099. The next prime is 11521304129. The reversal of 11521304117 is 71140312511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8515413841 + 3005890276 = 92279^2 + 54826^2 .

It is an emirp because it is prime and its reverse (71140312511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11521304117 - 2¹⁰ = 11521303093 is a prime.

It is a super-2 number, since 2×11521304117² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11521306117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760652058 + 5760652059.

It is an arithmetic number, because the mean of its divisors is an integer number (5760652059).

Almost surely, 2^11521304117 is an apocalyptic number.

It is an amenable number.

11521304117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521304117 is an equidigital number, since it uses as much as digits as its factorization.

11521304117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 26.

Adding to 11521304117 its reverse (71140312511), we get a palindrome (82661616628).

The spelling of 11521304117 in words is "eleven billion, five hundred twenty-one million, three hundred four thousand, one hundred seventeen".