20020003221 has 4 divisors (see below), whose sum is σ = 26693337632. Its totient is φ = 13346668812.

The previous prime is 20020003193. The next prime is 20020003247. The reversal of 20020003221 is 12230002002.

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 not a de Polignac number, because 20020003221 - 2⁷ = 20020003093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020003197 and 20020003206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020003271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336667201 + ... + 3336667206.

It is an arithmetic number, because the mean of its divisors is an integer number (6673334408).

Almost surely, 2^20020003221 is an apocalyptic number.

It is an amenable number.

20020003221 is a deficient number, since it is larger than the sum of its proper divisors (6673334411).

20020003221 is an equidigital number, since it uses as much as digits as its factorization.

20020003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673334410.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20020003221 its reverse (12230002002), we get a palindrome (32250005223).

The spelling of 20020003221 in words is "twenty billion, twenty million, three thousand, two hundred twenty-one".