221442421244 has 48 divisors (see below), whose sum is σ = 445330327680. Its totient is φ = 95288034240.

The previous prime is 221442421237. The next prime is 221442421259. The reversal of 221442421244 is 442124244122.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221442421244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051367 + ... + 1244289.

It is an arithmetic number, because the mean of its divisors is an integer number (9277715160).

Almost surely, 2^221442421244 is an apocalyptic number.

It is an amenable number.

221442421244 is an abundant number, since it is smaller than the sum of its proper divisors (223887906436).

221442421244 is a wasteful number, since it uses less digits than its factorization.

221442421244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194330 (or 194328 counting only the distinct ones).

The product of its digits is 32768, while the sum is 32.

Adding to 221442421244 its reverse (442124244122), we get a palindrome (663566665366).

The spelling of 221442421244 in words is "two hundred twenty-one billion, four hundred forty-two million, four hundred twenty-one thousand, two hundred forty-four".