11123320321 has 4 divisors (see below), whose sum is σ = 11134636992. Its totient is φ = 11112003652.

The previous prime is 11123320259. The next prime is 11123320333. The reversal of 11123320321 is 12302332111.

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: 12302332111 = 7333 ⋅1677667.

It is a cyclic number.

It is not a de Polignac number, because 11123320321 - 2¹³ = 11123312129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123320361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5656861 + ... + 5658826.

It is an arithmetic number, because the mean of its divisors is an integer number (2783659248).

Almost surely, 2^11123320321 is an apocalyptic number.

It is an amenable number.

11123320321 is a deficient number, since it is larger than the sum of its proper divisors (11316671).

11123320321 is an equidigital number, since it uses as much as digits as its factorization.

11123320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11316670.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11123320321 its reverse (12302332111), we get a palindrome (23425652432).

The spelling of 11123320321 in words is "eleven billion, one hundred twenty-three million, three hundred twenty thousand, three hundred twenty-one".