4042402221 has 32 divisors (see below), whose sum is σ = 6364108800. Its totient is φ = 2250072000.

The previous prime is 4042402219. The next prime is 4042402261. The reversal of 4042402221 is 1222042404.

It is not a de Polignac number, because 4042402221 - 2¹ = 4042402219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042402261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61696 + ... + 109046.

It is an arithmetic number, because the mean of its divisors is an integer number (198878400).

Almost surely, 2^4042402221 is an apocalyptic number.

It is an amenable number.

4042402221 is a deficient number, since it is larger than the sum of its proper divisors (2321706579).

4042402221 is a wasteful number, since it uses less digits than its factorization.

4042402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47577.

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

The square root of 4042402221 is about 63579.8884947119. Note that the first 3 decimals coincide. The cubic root of 4042402221 is about 1592.9904588282.

Adding to 4042402221 its reverse (1222042404), we get a palindrome (5264444625).

The spelling of 4042402221 in words is "four billion, forty-two million, four hundred two thousand, two hundred twenty-one".