221434323442 has 4 divisors (see below), whose sum is σ = 332151485166. Its totient is φ = 110717161720.

The previous prime is 221434323433. The next prime is 221434323443. The reversal of 221434323442 is 244323434122.

221434323442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244323434122 = 2 ⋅122161717061.

It can be written as a sum of positive squares in only one way, i.e., 152249016481 + 69185306961 = 390191^2 + 263031^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221434323398 and 221434323407.

It is not an unprimeable number, because it can be changed into a prime (221434323443) 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 as a sum of consecutive naturals, namely, 55358580859 + ... + 55358580862.

Almost surely, 2^221434323442 is an apocalyptic number.

221434323442 is a deficient number, since it is larger than the sum of its proper divisors (110717161724).

221434323442 is a wasteful number, since it uses less digits than its factorization.

221434323442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110717161723.

The product of its digits is 110592, while the sum is 34.

Adding to 221434323442 its reverse (244323434122), we get a palindrome (465757757564).

The spelling of 221434323442 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred twenty-three thousand, four hundred forty-two".