11321111 has 4 divisors (see below), whose sum is σ = 11348424. Its totient is φ = 11293800.

The previous prime is 11321087. The next prime is 11321119. The reversal of 11321111 is 11112311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112311 = 7 ⋅1587473.

It is a cyclic number.

It is not a de Polignac number, because 11321111 - 2⁶ = 11321047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11321092 and 11321101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321119) 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, 13025 + ... + 13866.

It is an arithmetic number, because the mean of its divisors is an integer number (2837106).

Almost surely, 2^11321111 is an apocalyptic number.

11321111 is a deficient number, since it is larger than the sum of its proper divisors (27313).

11321111 is an equidigital number, since it uses as much as digits as its factorization.

11321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312.

The product of its digits is 6, while the sum is 11.

The square root of 11321111 is about 3364.6858694386. The cubic root of 11321111 is about 224.5413603953.

Adding to 11321111 its reverse (11112311), we get a palindrome (22433422).

The spelling of 11321111 in words is "eleven million, three hundred twenty-one thousand, one hundred eleven".