2221242420 has 48 divisors (see below), whose sum is σ = 6289375680. Its totient is φ = 585674496.

The previous prime is 2221242403. The next prime is 2221242427. The reversal of 2221242420 is 242421222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221242427) 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 15 ways as a sum of consecutive naturals, for example, 202642 + ... + 213321.

It is an arithmetic number, because the mean of its divisors is an integer number (131028660).

Almost surely, 2^2221242420 is an apocalyptic number.

2221242420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221242420 is an abundant number, since it is smaller than the sum of its proper divisors (4068133260).

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

2221242420 is a wasteful number, since it uses less digits than its factorization.

2221242420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416064 (or 416062 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 2221242420 is about 47130.0585613895. The cubic root of 2221242420 is about 1304.7640623946.

Adding to 2221242420 its reverse (242421222), we get a palindrome (2463663642).

The spelling of 2221242420 in words is "two billion, two hundred twenty-one million, two hundred forty-two thousand, four hundred twenty".