2220220221 has 4 divisors (see below), whose sum is σ = 2960293632. Its totient is φ = 1480146812.

The previous prime is 2220220201. The next prime is 2220220231. The reversal of 2220220221 is 1220220222.

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 2220220221 - 2⁶ = 2220220157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220220201) 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, 370036701 + ... + 370036706.

It is an arithmetic number, because the mean of its divisors is an integer number (740073408).

Almost surely, 2^2220220221 is an apocalyptic number.

It is an amenable number.

2220220221 is a deficient number, since it is larger than the sum of its proper divisors (740073411).

2220220221 is an equidigital number, since it uses as much as digits as its factorization.

2220220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740073410.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2220220221 is about 47119.2128648177. The cubic root of 2220220221 is about 1304.5638841594.

Adding to 2220220221 its reverse (1220220222), we get a palindrome (3440440443).

Subtracting from 2220220221 its reverse (1220220222), we obtain a palindrome (999999999).

The spelling of 2220220221 in words is "two billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-one".