11323221121 has 4 divisors (see below), whose sum is σ = 11334579412. Its totient is φ = 11311862832.

The previous prime is 11323221101. The next prime is 11323221211. The reversal of 11323221121 is 12112232311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10597673025 + 725548096 = 102945^2 + 26936^2 .

It is a cyclic number.

It is not a de Polignac number, because 11323221121 - 2²¹ = 11321123969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11323221101) 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, 5677650 + ... + 5679643.

It is an arithmetic number, because the mean of its divisors is an integer number (2833644853).

Almost surely, 2^11323221121 is an apocalyptic number.

It is an amenable number.

11323221121 is a deficient number, since it is larger than the sum of its proper divisors (11358291).

11323221121 is an equidigital number, since it uses as much as digits as its factorization.

11323221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11358290.

The product of its digits is 144, while the sum is 19.

Adding to 11323221121 its reverse (12112232311), we get a palindrome (23435453432).

The spelling of 11323221121 in words is "eleven billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".