11001111021217 has 2 divisors, whose sum is σ = 11001111021218. Its totient is φ = 11001111021216.

The previous prime is 11001111021193. The next prime is 11001111021233. The reversal of 11001111021217 is 71212011110011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5765141947041 + 5235969074176 = 2401071^2 + 2288224^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001111021217 - 2¹⁵ = 11001110988449 is a prime.

It is a super-2 number, since 2×11001111021217² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11001111021194 and 11001111021203.

It is not a weakly prime, because it can be changed into another prime (11001111021317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500555510608 + 5500555510609.

It is an arithmetic number, because the mean of its divisors is an integer number (5500555510609).

Almost surely, 2^{11001111021217} is an apocalyptic number.

It is an amenable number.

11001111021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001111021217 is an equidigital number, since it uses as much as digits as its factorization.

11001111021217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 19.

Adding to 11001111021217 its reverse (71212011110011), we get a palindrome (82213122131228).

The spelling of 11001111021217 in words is "eleven trillion, one billion, one hundred eleven million, twenty-one thousand, two hundred seventeen".