424103220221 has 4 divisors (see below), whose sum is σ = 434447201244. Its totient is φ = 413759239200.

The previous prime is 424103220193. The next prime is 424103220251. The reversal of 424103220221 is 122022301424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165230868196 + 258872352025 = 406486^2 + 508795^2 .

It is a cyclic number.

It is not a de Polignac number, because 424103220221 - 2¹⁸ = 424102958077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424103220251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5171990450 + ... + 5171990531.

It is an arithmetic number, because the mean of its divisors is an integer number (108611800311).

Almost surely, 2^424103220221 is an apocalyptic number.

424103220221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

424103220221 is a deficient number, since it is larger than the sum of its proper divisors (10343981023).

424103220221 is a wasteful number, since it uses less digits than its factorization.

424103220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343981022.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 424103220221 its reverse (122022301424), we get a palindrome (546125521645).

The spelling of 424103220221 in words is "four hundred twenty-four billion, one hundred three million, two hundred twenty thousand, two hundred twenty-one".