2221021430 has 16 divisors (see below), whose sum is σ = 3999031344. Its totient is φ = 888143520.

The previous prime is 2221021417. The next prime is 2221021447. The reversal of 2221021430 is 341201222.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2221021399 and 2221021408.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4049 + ... + 66771.

It is an arithmetic number, because the mean of its divisors is an integer number (249939459).

Almost surely, 2^2221021430 is an apocalyptic number.

2221021430 is a deficient number, since it is larger than the sum of its proper divisors (1778009914).

2221021430 is a wasteful number, since it uses less digits than its factorization.

2221021430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66271.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2221021430 is about 47127.7140332522. The cubic root of 2221021430 is about 1304.7207909098.

Adding to 2221021430 its reverse (341201222), we get a palindrome (2562222652).

The spelling of 2221021430 in words is "two billion, two hundred twenty-one million, twenty-one thousand, four hundred thirty".