220420044421 has 4 divisors (see below), whose sum is σ = 220762844512. Its totient is φ = 220077244332.

The previous prime is 220420044407. The next prime is 220420044437. The reversal of 220420044421 is 124440024022.

220420044421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220420044421 - 2¹⁹ = 220419520133 is a prime.

It is a super-2 number, since 2×220420044421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220420044401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171399081 + ... + 171400366.

It is an arithmetic number, because the mean of its divisors is an integer number (55190711128).

Almost surely, 2^220420044421 is an apocalyptic number.

It is an amenable number.

220420044421 is a deficient number, since it is larger than the sum of its proper divisors (342800091).

220420044421 is an equidigital number, since it uses as much as digits as its factorization.

220420044421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342800090.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 220420044421 its reverse (124440024022), we get a palindrome (344860068443).

The spelling of 220420044421 in words is "two hundred twenty billion, four hundred twenty million, forty-four thousand, four hundred twenty-one".