220424204244421 has 4 divisors (see below), whose sum is σ = 222564245062432. Its totient is φ = 218284163426412.

The previous prime is 220424204244407. The next prime is 220424204244481. The reversal of 220424204244421 is 124442402424022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220424204244421 - 2¹¹ = 220424204242373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220424204244481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070020408851 + ... + 1070020409056.

It is an arithmetic number, because the mean of its divisors is an integer number (55641061265608).

Almost surely, 2^{220424204244421} is an apocalyptic number.

It is an amenable number.

220424204244421 is a deficient number, since it is larger than the sum of its proper divisors (2140040818011).

220424204244421 is a wasteful number, since it uses less digits than its factorization.

220424204244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140040818010.

The product of its (nonzero) digits is 262144, while the sum is 37.

Adding to 220424204244421 its reverse (124442402424022), we get a palindrome (344866606668443).

The spelling of 220424204244421 in words is "two hundred twenty trillion, four hundred twenty-four billion, two hundred four million, two hundred forty-four thousand, four hundred twenty-one".