11321311 has 4 divisors (see below), whose sum is σ = 11331792. Its totient is φ = 11310832.

The previous prime is 11321291. The next prime is 11321327. The reversal of 11321311 is 11312311.

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: 11312311 = 43 ⋅263077.

It is a cyclic number.

It is not a de Polignac number, because 11321311 - 2⁵ = 11321279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11321291 and 11321300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11324311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406 + ... + 5851.

It is an arithmetic number, because the mean of its divisors is an integer number (2832948).

Almost surely, 2^11321311 is an apocalyptic number.

11321311 is a deficient number, since it is larger than the sum of its proper divisors (10481).

11321311 is an equidigital number, since it uses as much as digits as its factorization.

11321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10480.

The product of its digits is 18, while the sum is 13.

The square root of 11321311 is about 3364.7155897639. The cubic root of 11321311 is about 224.5426826450.

Adding to 11321311 its reverse (11312311), we get a palindrome (22633622).

The spelling of 11321311 in words is "eleven million, three hundred twenty-one thousand, three hundred eleven".