424444220221 has 8 divisors (see below), whose sum is σ = 485406213824. Its totient is φ = 363564002880.

The previous prime is 424444220201. The next prime is 424444220257. The reversal of 424444220221 is 122022444424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 424444220221 - 2¹⁹ = 424443695933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424444220201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20432940 + ... + 20453701.

It is an arithmetic number, because the mean of its divisors is an integer number (60675776728).

Almost surely, 2^424444220221 is an apocalyptic number.

It is an amenable number.

424444220221 is a deficient number, since it is larger than the sum of its proper divisors (60961993603).

424444220221 is a wasteful number, since it uses less digits than its factorization.

424444220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40888131.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 424444220221 its reverse (122022444424), we get a palindrome (546466664645).

The spelling of 424444220221 in words is "four hundred twenty-four billion, four hundred forty-four million, two hundred twenty thousand, two hundred twenty-one".