2221120221 has 8 divisors (see below), whose sum is σ = 2963274720. Its totient is φ = 1479856272.

The previous prime is 2221120177. The next prime is 2221120229. The reversal of 2221120221 is 1220211222.

2221120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2221120221 - 2⁷ = 2221120093 is a prime.

It is a super-2 number, since 2×2221120221² = 9866750072270177682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2221120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221120229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216795 + ... + 226808.

It is an arithmetic number, because the mean of its divisors is an integer number (370409340).

Almost surely, 2^2221120221 is an apocalyptic number.

It is an amenable number.

2221120221 is a deficient number, since it is larger than the sum of its proper divisors (742154499).

2221120221 is a wasteful number, since it uses less digits than its factorization.

2221120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445275.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2221120221 is about 47128.7621416052. The cubic root of 2221120221 is about 1304.7401352767.

Adding to 2221120221 its reverse (1220211222), we get a palindrome (3441331443).

The spelling of 2221120221 in words is "two billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".