4142221221 has 8 divisors (see below), whose sum is σ = 5526200160. Its totient is φ = 2759861552.

The previous prime is 4142221219. The next prime is 4142221231. The reversal of 4142221221 is 1221222414.

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

It is a cyclic number.

It is not a de Polignac number, because 4142221221 - 2¹ = 4142221219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398835 + ... + 409088.

It is an arithmetic number, because the mean of its divisors is an integer number (690775020).

Almost surely, 2^4142221221 is an apocalyptic number.

It is an amenable number.

4142221221 is a deficient number, since it is larger than the sum of its proper divisors (1383978939).

4142221221 is a wasteful number, since it uses less digits than its factorization.

4142221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809635.

The product of its digits is 512, while the sum is 21.

The square root of 4142221221 is about 64360.0902811673. The cubic root of 4142221221 is about 1605.9958908915.

Adding to 4142221221 its reverse (1221222414), we get a palindrome (5363443635).

The spelling of 4142221221 in words is "four billion, one hundred forty-two million, two hundred twenty-one thousand, two hundred twenty-one".