11323210211221 has 2 divisors, whose sum is σ = 11323210211222. Its totient is φ = 11323210211220.

The previous prime is 11323210211197. The next prime is 11323210211267. The reversal of 11323210211221 is 12211201232311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6192577503121 + 5130632708100 = 2488489^2 + 2265090^2 .

It is an emirp because it is prime and its reverse (12211201232311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11323210211221 - 2²⁹ = 11322673340309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11323210211192 and 11323210211201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11323210212221) 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 as a sum of consecutive naturals, namely, 5661605105610 + 5661605105611.

It is an arithmetic number, because the mean of its divisors is an integer number (5661605105611).

Almost surely, 2^{11323210211221} is an apocalyptic number.

It is an amenable number.

11323210211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11323210211221 is an equidigital number, since it uses as much as digits as its factorization.

11323210211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11323210211221 its reverse (12211201232311), we get a palindrome (23534411443532).

The spelling of 11323210211221 in words is "eleven trillion, three hundred twenty-three billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".