2213021220 has 48 divisors (see below), whose sum is σ = 6210908928. Its totient is φ = 588762880.

The previous prime is 2213021203. The next prime is 2213021243. The reversal of 2213021220 is 221203122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2213021220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16929 + ... + 68648.

It is an arithmetic number, because the mean of its divisors is an integer number (129393936).

Almost surely, 2^2213021220 is an apocalyptic number.

2213021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2213021220 is an abundant number, since it is smaller than the sum of its proper divisors (3997887708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2213021220 is a wasteful number, since it uses less digits than its factorization.

2213021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86020 (or 86018 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2213021220 is about 47042.7594853873. The cubic root of 2213021220 is about 1303.1523536633.

Adding to 2213021220 its reverse (221203122), we get a palindrome (2434224342).

The spelling of 2213021220 in words is "two billion, two hundred thirteen million, twenty-one thousand, two hundred twenty".