11445711217 has 2 divisors, whose sum is σ = 11445711218. Its totient is φ = 11445711216.

The previous prime is 11445711209. The next prime is 11445711223. The reversal of 11445711217 is 71211754411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10724466481 + 721244736 = 103559^2 + 26856^2 .

It is a cyclic number.

It is not a de Polignac number, because 11445711217 - 2³ = 11445711209 is a prime.

It is not a weakly prime, because it can be changed into another prime (11445711917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5722855608 + 5722855609.

It is an arithmetic number, because the mean of its divisors is an integer number (5722855609).

Almost surely, 2^11445711217 is an apocalyptic number.

It is an amenable number.

11445711217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11445711217 is an equidigital number, since it uses as much as digits as its factorization.

11445711217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The spelling of 11445711217 in words is "eleven billion, four hundred forty-five million, seven hundred eleven thousand, two hundred seventeen".