11006317921 has 3 divisors (see below), whose sum is σ = 11006422833. Its totient is φ = 11006213010.

The previous prime is 11006317913. The next prime is 11006317951. The reversal of 11006317921 is 12971360011.

The square root of 11006317921 is 104911.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12971360011 = 127 ⋅102136693.

It is not a de Polignac number, because 11006317921 - 2³ = 11006317913 is a prime.

It is a super-2 number, since 2×11006317921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11006317951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52456 + ... + 157366.

It is an arithmetic number, because the mean of its divisors is an integer number (3668807611).

Almost surely, 2^11006317921 is an apocalyptic number.

11006317921 is the 104911-st square number.

11006317921 is the 52456-th centered octagonal number.

It is an amenable number.

11006317921 is a deficient number, since it is larger than the sum of its proper divisors (104912).

11006317921 is an frugal number, since it uses more digits than its factorization.

11006317921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209822 (or 104911 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

Adding to 11006317921 its reverse (12971360011), we get a palindrome (23977677932).

The spelling of 11006317921 in words is "eleven billion, six million, three hundred seventeen thousand, nine hundred twenty-one".