2003220221 has 4 divisors (see below), whose sum is σ = 2003544444. Its totient is φ = 2002896000.

The previous prime is 2003220187. The next prime is 2003220223. The reversal of 2003220221 is 1220223002.

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 1270922500 + 732297721 = 35650^2 + 27061^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003220221 - 2⁶ = 2003220157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003220196 and 2003220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003220223) 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, 152660 + ... + 165261.

It is an arithmetic number, because the mean of its divisors is an integer number (500886111).

Almost surely, 2^2003220221 is an apocalyptic number.

It is an amenable number.

2003220221 is a deficient number, since it is larger than the sum of its proper divisors (324223).

2003220221 is an equidigital number, since it uses as much as digits as its factorization.

2003220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324222.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2003220221 is about 44757.3482346754. The cubic root of 2003220221 is about 1260.5968913353.

Adding to 2003220221 its reverse (1220223002), we get a palindrome (3223443223).

The spelling of 2003220221 in words is "two billion, three million, two hundred twenty thousand, two hundred twenty-one".