11111422321 has 4 divisors (see below), whose sum is σ = 11177957952. Its totient is φ = 11044886692.

The previous prime is 11111422279. The next prime is 11111422331. The reversal of 11111422321 is 12322411111.

11111422321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 12322411111 = 431 ⋅28590281.

It is a cyclic number.

It is not a de Polignac number, because 11111422321 - 2¹⁷ = 11111291249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111422331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33267565 + ... + 33267898.

It is an arithmetic number, because the mean of its divisors is an integer number (2794489488).

Almost surely, 2^11111422321 is an apocalyptic number.

It is an amenable number.

11111422321 is a deficient number, since it is larger than the sum of its proper divisors (66535631).

11111422321 is an equidigital number, since it uses as much as digits as its factorization.

11111422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66535630.

The product of its digits is 96, while the sum is 19.

Adding to 11111422321 its reverse (12322411111), we get a palindrome (23433833432).

The spelling of 11111422321 in words is "eleven billion, one hundred eleven million, four hundred twenty-two thousand, three hundred twenty-one".