11221324021 has 2 divisors, whose sum is σ = 11221324022. Its totient is φ = 11221324020.

The previous prime is 11221324013. The next prime is 11221324027. The reversal of 11221324021 is 12042312211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11048112100 + 173211921 = 105110^2 + 13161^2 .

It is an emirp because it is prime and its reverse (12042312211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221324021 - 2³ = 11221324013 is a prime.

It is a super-2 number, since 2×11221324021² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221324021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221324027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610662010 + 5610662011.

It is an arithmetic number, because the mean of its divisors is an integer number (5610662011).

Almost surely, 2^11221324021 is an apocalyptic number.

It is an amenable number.

11221324021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221324021 is an equidigital number, since it uses as much as digits as its factorization.

11221324021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11221324021 its reverse (12042312211), we get a palindrome (23263636232).

The spelling of 11221324021 in words is "eleven billion, two hundred twenty-one million, three hundred twenty-four thousand, twenty-one".