11321222021213 has 4 divisors (see below), whose sum is σ = 12192085253628. Its totient is φ = 10450358788800.

The previous prime is 11321222021209. The next prime is 11321222021227. The reversal of 11321222021213 is 31212022212311.

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 1563832784089 + 9757389237124 = 1250533^2 + 3123682^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321222021213 - 2² = 11321222021209 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 (11321222021273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435431616188 + ... + 435431616213.

It is an arithmetic number, because the mean of its divisors is an integer number (3048021313407).

Almost surely, 2^{11321222021213} is an apocalyptic number.

11321222021213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11321222021213 is a deficient number, since it is larger than the sum of its proper divisors (870863232415).

11321222021213 is an equidigital number, since it uses as much as digits as its factorization.

11321222021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870863232414.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 11321222021213 its reverse (31212022212311), we get a palindrome (42533244233524).

The spelling of 11321222021213 in words is "eleven trillion, three hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred thirteen".