2220100221 has 4 divisors (see below), whose sum is σ = 2960133632. Its totient is φ = 1480066812.

The previous prime is 2220100187. The next prime is 2220100229. The reversal of 2220100221 is 1220010222.

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 2220100221 - 2¹¹ = 2220098173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220100197 and 2220100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220100229) 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, 370016701 + ... + 370016706.

It is an arithmetic number, because the mean of its divisors is an integer number (740033408).

Almost surely, 2^2220100221 is an apocalyptic number.

It is an amenable number.

2220100221 is a deficient number, since it is larger than the sum of its proper divisors (740033411).

2220100221 is an equidigital number, since it uses as much as digits as its factorization.

2220100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740033410.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2220100221 is about 47117.9394816879. The cubic root of 2220100221 is about 1304.5403804119.

Adding to 2220100221 its reverse (1220010222), we get a palindrome (3440110443).

The spelling of 2220100221 in words is "two billion, two hundred twenty million, one hundred thousand, two hundred twenty-one".