11217123 has 32 divisors (see below), whose sum is σ = 17633280. Its totient is φ = 7120872.

The previous prime is 11217121. The next prime is 11217181. The reversal of 11217123 is 32171211.

It is a happy number.

11217123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11217123 - 2¹ = 11217121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11217096 and 11217105.

It is not an unprimeable number, because it can be changed into a prime (11217121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50190 + ... + 50412.

It is an arithmetic number, because the mean of its divisors is an integer number (551040).

Almost surely, 2^11217123 is an apocalyptic number.

11217123 is a deficient number, since it is larger than the sum of its proper divisors (6416157).

11217123 is an frugal number, since it uses more digits than its factorization.

11217123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 249 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 11217123 is about 3349.1973665343. The cubic root of 11217123 is about 223.8517500665.

Adding to 11217123 its reverse (32171211), we get a palindrome (43388334).

The spelling of 11217123 in words is "eleven million, two hundred seventeen thousand, one hundred twenty-three".