11223232321 has 4 divisors (see below), whose sum is σ = 12826551232. Its totient is φ = 9619913412.

The previous prime is 11223232297. The next prime is 11223232327. The reversal of 11223232321 is 12323232211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12323232211 = 19 ⋅648591169.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11223232321 is a prime.

It is a super-2 number, since 2×11223232321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11223232292 and 11223232301.

It is not an unprimeable number, because it can be changed into a prime (11223232327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801659445 + ... + 801659458.

It is an arithmetic number, because the mean of its divisors is an integer number (3206637808).

Almost surely, 2^11223232321 is an apocalyptic number.

It is an amenable number.

11223232321 is a deficient number, since it is larger than the sum of its proper divisors (1603318911).

11223232321 is an equidigital number, since it uses as much as digits as its factorization.

11223232321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603318910.

The product of its digits is 864, while the sum is 22.

Adding to 11223232321 its reverse (12323232211), we get a palindrome (23546464532).

The spelling of 11223232321 in words is "eleven billion, two hundred twenty-three million, two hundred thirty-two thousand, three hundred twenty-one".