22304504111221 has 2 divisors, whose sum is σ = 22304504111222. Its totient is φ = 22304504111220.

The previous prime is 22304504111213. The next prime is 22304504111333. The reversal of 22304504111221 is 12211140540322.

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., 22233582562500 + 70921548721 = 4715250^2 + 266311^2 .

It is a cyclic number.

It is not a de Polignac number, because 22304504111221 - 2³ = 22304504111213 is a prime.

It is a super-2 number, since 2×22304504111221² (a number of 27 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 22304504111221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22304504112221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11152252055610 + 11152252055611.

It is an arithmetic number, because the mean of its divisors is an integer number (11152252055611).

Almost surely, 2^{22304504111221} is an apocalyptic number.

It is an amenable number.

22304504111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22304504111221 is an equidigital number, since it uses as much as digits as its factorization.

22304504111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 22304504111221 its reverse (12211140540322), we get a palindrome (34515644651543).

The spelling of 22304504111221 in words is "twenty-two trillion, three hundred four billion, five hundred four million, one hundred eleven thousand, two hundred twenty-one".