11123321 has 12 divisors (see below), whose sum is σ = 12894000. Its totient is φ = 9514560.

The previous prime is 11123317. The next prime is 11123323. The reversal of 11123321 is 12332111.

It is not a de Polignac number, because 11123321 - 2² = 11123317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123296 and 11123305.

It is not an unprimeable number, because it can be changed into a prime (11123323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1430 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (1074500).

Almost surely, 2^11123321 is an apocalyptic number.

11123321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11123321 is a deficient number, since it is larger than the sum of its proper divisors (1770679).

11123321 is a wasteful number, since it uses less digits than its factorization.

11123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544 (or 3527 counting only the distinct ones).

The product of its digits is 36, while the sum is 14.

The square root of 11123321 is about 3335.1643137932. The cubic root of 11123321 is about 223.2260237917.

Adding to 11123321 its reverse (12332111), we get a palindrome (23455432).

It can be divided in two parts, 111 and 23321, that added together give a palindrome (23432).

The spelling of 11123321 in words is "eleven million, one hundred twenty-three thousand, three hundred twenty-one".