4020221042 has 8 divisors (see below), whose sum is σ = 6047611500. Its totient is φ = 2004350544.

The previous prime is 4020221041. The next prime is 4020221057. The reversal of 4020221042 is 2401220204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3918634801 + 101586241 = 62599^2 + 10079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4020221042.

It is not an unprimeable number, because it can be changed into a prime (4020221041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879117 + ... + 2880512.

Almost surely, 2^4020221042 is an apocalyptic number.

4020221042 is a deficient number, since it is larger than the sum of its proper divisors (2027390458).

4020221042 is a wasteful number, since it uses less digits than its factorization.

4020221042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759980.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 4020221042 is about 63405.2130506633. The cubic root of 4020221042 is about 1590.0714657434.

Adding to 4020221042 its reverse (2401220204), we get a palindrome (6421441246).

The spelling of 4020221042 in words is "four billion, twenty million, two hundred twenty-one thousand, forty-two".