2220331221 has 12 divisors (see below), whose sum is σ = 3232399872. Its totient is φ = 1468564776.

The previous prime is 2220331207. The next prime is 2220331297. The reversal of 2220331221 is 1221330222.

It is not a de Polignac number, because 2220331221 - 2⁷ = 2220331093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220331194 and 2220331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220331021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 970131 + ... + 972416.

It is an arithmetic number, because the mean of its divisors is an integer number (269366656).

Almost surely, 2^2220331221 is an apocalyptic number.

It is an amenable number.

2220331221 is a deficient number, since it is larger than the sum of its proper divisors (1012068651).

2220331221 is a wasteful number, since it uses less digits than its factorization.

2220331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942680 (or 1942677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2220331221 is about 47120.3907135754. The cubic root of 2220331221 is about 1304.5856243719.

Adding to 2220331221 its reverse (1221330222), we get a palindrome (3441661443).

Subtracting from 2220331221 its reverse (1221330222), we obtain a palindrome (999000999).

The spelling of 2220331221 in words is "two billion, two hundred twenty million, three hundred thirty-one thousand, two hundred twenty-one".