4220052221 has 32 divisors (see below), whose sum is σ = 5332642560. Its totient is φ = 3244032000.

The previous prime is 4220052203. The next prime is 4220052251. The reversal of 4220052221 is 1222500224.

It is not a de Polignac number, because 4220052221 - 2⁶ = 4220052157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4220052193 and 4220052202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220052251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2994365 + ... + 2995773.

It is an arithmetic number, because the mean of its divisors is an integer number (166645080).

Almost surely, 2^4220052221 is an apocalyptic number.

It is an amenable number.

4220052221 is a deficient number, since it is larger than the sum of its proper divisors (1112590339).

4220052221 is a wasteful number, since it uses less digits than its factorization.

4220052221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4220052221 is about 64961.9290123069. The cubic root of 4220052221 is about 1615.9922552412.

Adding to 4220052221 its reverse (1222500224), we get a palindrome (5442552445).

The spelling of 4220052221 in words is "four billion, two hundred twenty million, fifty-two thousand, two hundred twenty-one".