221223144242 has 16 divisors (see below), whose sum is σ = 337369168152. Its totient is φ = 108767771520.

The previous prime is 221223144211. The next prime is 221223144269. The reversal of 221223144242 is 242441322122.

221223144242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 169102710841 + 52120433401 = 411221^2 + 228299^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 186008 + ... + 690684.

Almost surely, 2^221223144242 is an apocalyptic number.

221223144242 is a deficient number, since it is larger than the sum of its proper divisors (116146023910).

221223144242 is a wasteful number, since it uses less digits than its factorization.

221223144242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508333.

The product of its digits is 12288, while the sum is 29.

Adding to 221223144242 its reverse (242441322122), we get a palindrome (463664466364).

The spelling of 221223144242 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred forty-four thousand, two hundred forty-two".