2221041220 has 24 divisors (see below), whose sum is σ = 4665100608. Its totient is φ = 888242400.

The previous prime is 2221041149. The next prime is 2221041227. The reversal of 2221041220 is 221401222.

It is a junction number, because it is equal to n+sod(n) for n = 2221041194 and 2221041203.

It is not an unprimeable number, because it can be changed into a prime (2221041227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 156625 + ... + 170215.

It is an arithmetic number, because the mean of its divisors is an integer number (194379192).

Almost surely, 2^2221041220 is an apocalyptic number.

2221041220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221041220 is an abundant number, since it is smaller than the sum of its proper divisors (2444059388).

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

2221041220 is a wasteful number, since it uses less digits than its factorization.

2221041220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21771 (or 21769 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2221041220 is about 47127.9239941672. The cubic root of 2221041220 is about 1304.7246660559.

Adding to 2221041220 its reverse (221401222), we get a palindrome (2442442442).

The spelling of 2221041220 in words is "two billion, two hundred twenty-one million, forty-one thousand, two hundred twenty".