4142220221 has 8 divisors (see below), whose sum is σ = 4387695480. Its totient is φ = 3896946688.

The previous prime is 4142220211. The next prime is 4142220227. The reversal of 4142220221 is 1220222414.

It can be written as a sum of positive squares in 4 ways, for example, as 2421132025 + 1721088196 = 49205^2 + 41486^2 .

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 4142220221 - 2¹⁸ = 4141958077 is a prime.

It is a super-2 number, since 2×4142220221² = 34315976718522577682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4142220193 and 4142220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142220227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7076 + ... + 91293.

It is an arithmetic number, because the mean of its divisors is an integer number (548461935).

Almost surely, 2^4142220221 is an apocalyptic number.

It is an amenable number.

4142220221 is a deficient number, since it is larger than the sum of its proper divisors (245475259).

4142220221 is a wasteful number, since it uses less digits than its factorization.

4142220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100863.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4142220221 is about 64360.0825123772. The cubic root of 4142220221 is about 1605.9957616536.

Adding to 4142220221 its reverse (1220222414), we get a palindrome (5362442635).

The spelling of 4142220221 in words is "four billion, one hundred forty-two million, two hundred twenty thousand, two hundred twenty-one".