11662213217 has 2 divisors, whose sum is σ = 11662213218. Its totient is φ = 11662213216.

The previous prime is 11662213159. The next prime is 11662213249. The reversal of 11662213217 is 71231226611.

It is an a-pointer prime, because the next prime (11662213249) can be obtained adding 11662213217 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11036763136 + 625450081 = 105056^2 + 25009^2 .

It is a cyclic number.

It is not a de Polignac number, because 11662213217 - 2¹² = 11662209121 is a prime.

It is not a weakly prime, because it can be changed into another prime (11662213117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831106608 + 5831106609.

It is an arithmetic number, because the mean of its divisors is an integer number (5831106609).

Almost surely, 2^11662213217 is an apocalyptic number.

It is an amenable number.

11662213217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11662213217 is an equidigital number, since it uses as much as digits as its factorization.

11662213217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

Adding to 11662213217 its reverse (71231226611), we get a palindrome (82893439828).

The spelling of 11662213217 in words is "eleven billion, six hundred sixty-two million, two hundred thirteen thousand, two hundred seventeen".