2220120221 has 12 divisors (see below), whose sum is σ = 2446016832. Its totient is φ = 2013561000.

The previous prime is 2220120191. The next prime is 2220120239. The reversal of 2220120221 is 1220210222.

It is not a de Polignac number, because 2220120221 - 2¹⁸ = 2219858077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2220120196 and 2220120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220120281) 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 11 ways as a sum of consecutive naturals, for example, 30866 + ... + 73436.

It is an arithmetic number, because the mean of its divisors is an integer number (203834736).

Almost surely, 2^2220120221 is an apocalyptic number.

It is an amenable number.

2220120221 is a deficient number, since it is larger than the sum of its proper divisors (225896611).

2220120221 is a wasteful number, since it uses less digits than its factorization.

2220120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43024 (or 43013 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2220120221 is about 47118.1517145993. The cubic root of 2220120221 is about 1304.5442977619.

Adding to 2220120221 its reverse (1220210222), we get a palindrome (3440330443).

Subtracting from 2220120221 its reverse (1220210222), we obtain a palindrome (999909999).

The spelling of 2220120221 in words is "two billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-one".