1224224004221 has 16 divisors (see below), whose sum is σ = 1248012960768. Its totient is φ = 1200601710000.

The previous prime is 1224224004203. The next prime is 1224224004277. The reversal of 1224224004221 is 1224004224221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224224004221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224224004281) 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 in 15 ways as a sum of consecutive naturals, for example, 39857756 + ... + 39888458.

It is an arithmetic number, because the mean of its divisors is an integer number (78000810048).

Almost surely, 2^{1224224004221} is an apocalyptic number.

It is an amenable number.

1224224004221 is a deficient number, since it is larger than the sum of its proper divisors (23788956547).

1224224004221 is a wasteful number, since it uses less digits than its factorization.

1224224004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33392.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 1224224004221 its reverse (1224004224221), we get a palindrome (2448228228442).

The spelling of 1224224004221 in words is "one trillion, two hundred twenty-four billion, two hundred twenty-four million, four thousand, two hundred twenty-one".