11217816254863 has 2 divisors, whose sum is σ = 11217816254864. Its totient is φ = 11217816254862.

The previous prime is 11217816254839. The next prime is 11217816254867. The reversal of 11217816254863 is 36845261871211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11217816254863 - 2²⁵ = 11217782700431 is a prime.

It is a super-2 number, since 2×11217816254863² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11217816254867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608908127431 + 5608908127432.

It is an arithmetic number, because the mean of its divisors is an integer number (5608908127432).

Almost surely, 2^{11217816254863} is an apocalyptic number.

11217816254863 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217816254863 is an equidigital number, since it uses as much as digits as its factorization.

11217816254863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 55.

The spelling of 11217816254863 in words is "eleven trillion, two hundred seventeen billion, eight hundred sixteen million, two hundred fifty-four thousand, eight hundred sixty-three".