11118321 has 6 divisors (see below), whose sum is σ = 16059810. Its totient is φ = 7412208.

The previous prime is 11118319. The next prime is 11118337. The reversal of 11118321 is 12381111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 1440000 = 3111^2 + 1200^2 .

It is not a de Polignac number, because 11118321 - 2¹ = 11118319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11118294 and 11118303.

It is not an unprimeable number, because it can be changed into a prime (11118311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617676 + ... + 617693.

It is an arithmetic number, because the mean of its divisors is an integer number (2676635).

Almost surely, 2^11118321 is an apocalyptic number.

It is an amenable number.

11118321 is a deficient number, since it is larger than the sum of its proper divisors (4941489).

11118321 is a wasteful number, since it uses less digits than its factorization.

11118321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235375 (or 1235372 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 11118321 is about 3334.4146412826. The cubic root of 11118321 is about 223.1925716301.

Adding to 11118321 its reverse (12381111), we get a palindrome (23499432).

The spelling of 11118321 in words is "eleven million, one hundred eighteen thousand, three hundred twenty-one".