11223201211021 has 2 divisors, whose sum is σ = 11223201211022. Its totient is φ = 11223201211020.

The previous prime is 11223201211007. The next prime is 11223201211049. The reversal of 11223201211021 is 12011210232211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8688705370921 + 2534495840100 = 2947661^2 + 1592010^2 .

It is an emirp because it is prime and its reverse (12011210232211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11223201211021 - 2⁹ = 11223201210509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11223201211021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11223201211091) 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, 5611600605510 + 5611600605511.

It is an arithmetic number, because the mean of its divisors is an integer number (5611600605511).

Almost surely, 2^{11223201211021} is an apocalyptic number.

It is an amenable number.

11223201211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223201211021 is an equidigital number, since it uses as much as digits as its factorization.

11223201211021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11223201211021 its reverse (12011210232211), we get a palindrome (23234411443232).

The spelling of 11223201211021 in words is "eleven trillion, two hundred twenty-three billion, two hundred one million, two hundred eleven thousand, twenty-one".