11323213011221 has 4 divisors (see below), whose sum is σ = 11323221771372. Its totient is φ = 11323204251072.

The previous prime is 11323213011211. The next prime is 11323213011239. The reversal of 11323213011221 is 12211031232311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1189266586225 + 10133946424996 = 1090535^2 + 3183386^2 .

It is a cyclic number.

It is not a de Polignac number, because 11323213011221 - 2¹⁴ = 11323212994837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323213011211) 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, 2015810 + ... + 5168163.

It is an arithmetic number, because the mean of its divisors is an integer number (2830805442843).

Almost surely, 2^{11323213011221} is an apocalyptic number.

It is an amenable number.

11323213011221 is a deficient number, since it is larger than the sum of its proper divisors (8760151).

11323213011221 is an equidigital number, since it uses as much as digits as its factorization.

11323213011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8760150.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11323213011221 its reverse (12211031232311), we get a palindrome (23534244243532).

The spelling of 11323213011221 in words is "eleven trillion, three hundred twenty-three billion, two hundred thirteen million, eleven thousand, two hundred twenty-one".