11004213221 has 2 divisors, whose sum is σ = 11004213222. Its totient is φ = 11004213220.

The previous prime is 11004213191. The next prime is 11004213247. The reversal of 11004213221 is 12231240011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9334264996 + 1669948225 = 96614^2 + 40865^2 .

It is a cyclic number.

It is not a de Polignac number, because 11004213221 - 2¹⁴ = 11004196837 is a prime.

It is a super-2 number, since 2×11004213221² (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 11004213221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11004213421) 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, 5502106610 + 5502106611.

It is an arithmetic number, because the mean of its divisors is an integer number (5502106611).

Almost surely, 2^11004213221 is an apocalyptic number.

It is an amenable number.

11004213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11004213221 is an equidigital number, since it uses as much as digits as its factorization.

11004213221 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 17.

Adding to 11004213221 its reverse (12231240011), we get a palindrome (23235453232).

The spelling of 11004213221 in words is "eleven billion, four million, two hundred thirteen thousand, two hundred twenty-one".