4220000221 has 4 divisors (see below), whose sum is σ = 4365517500. Its totient is φ = 4074482944.

The previous prime is 4220000173. The next prime is 4220000227. The reversal of 4220000221 is 1220000224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3414064900 + 805935321 = 58430^2 + 28389^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220000221 - 2¹⁹ = 4219475933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220000227) 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 3 ways as a sum of consecutive naturals, for example, 72758596 + ... + 72758653.

It is an arithmetic number, because the mean of its divisors is an integer number (1091379375).

Almost surely, 2^4220000221 is an apocalyptic number.

It is an amenable number.

4220000221 is a deficient number, since it is larger than the sum of its proper divisors (145517279).

4220000221 is a wasteful number, since it uses less digits than its factorization.

4220000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145517278.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4220000221 is about 64961.5287766536. The cubic root of 4220000221 is about 1615.9856177291.

Adding to 4220000221 its reverse (1220000224), we get a palindrome (5440000445).

The spelling of 4220000221 in words is "four billion, two hundred twenty million, two hundred twenty-one", and thus it is an aban number.