1223223421221 has 24 divisors (see below), whose sum is σ = 1777859534880. Its totient is φ = 810414805536.

The previous prime is 1223223421177. The next prime is 1223223421241. The reversal of 1223223421221 is 1221243223221.

1223223421221 is a `hidden beast` number, since 1 + 2 + 232 + 2 + 3 + 421 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 1223223421221 - 2⁷ = 1223223421093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223223421241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24663370 + ... + 24712916.

It is an arithmetic number, because the mean of its divisors is an integer number (74077480620).

Almost surely, 2^{1223223421221} is an apocalyptic number.

It is an amenable number.

1223223421221 is a deficient number, since it is larger than the sum of its proper divisors (554636113659).

1223223421221 is a wasteful number, since it uses less digits than its factorization.

1223223421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66545 (or 66542 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 1223223421221 its reverse (1221243223221), we get a palindrome (2444466644442).

The spelling of 1223223421221 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-three million, four hundred twenty-one thousand, two hundred twenty-one".