221214422444 has 6 divisors (see below), whose sum is σ = 387125239284. Its totient is φ = 110607211220.

The previous prime is 221214422437. The next prime is 221214422447. The reversal of 221214422444 is 444224412122.

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 221214422444.

It is not an unprimeable number, because it can be changed into a prime (221214422447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27651802802 + ... + 27651802809.

It is an arithmetic number, because the mean of its divisors is an integer number (64520873214).

Almost surely, 2^221214422444 is an apocalyptic number.

It is an amenable number.

221214422444 is a deficient number, since it is larger than the sum of its proper divisors (165910816840).

221214422444 is a wasteful number, since it uses less digits than its factorization.

221214422444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55303605615 (or 55303605613 counting only the distinct ones).

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

Adding to 221214422444 its reverse (444224412122), we get a palindrome (665438834566).

The spelling of 221214422444 in words is "two hundred twenty-one billion, two hundred fourteen million, four hundred twenty-two thousand, four hundred forty-four".