4221220305 has 16 divisors (see below), whose sum is σ = 6757701120. Its totient is φ = 2250067968.

The previous prime is 4221220303. The next prime is 4221220327. The reversal of 4221220305 is 5030221224.

It is not a de Polignac number, because 4221220305 - 2¹ = 4221220303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4221220303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49840 + ... + 104529.

It is an arithmetic number, because the mean of its divisors is an integer number (422356320).

Almost surely, 2^4221220305 is an apocalyptic number.

It is an amenable number.

4221220305 is a deficient number, since it is larger than the sum of its proper divisors (2536480815).

4221220305 is a wasteful number, since it uses less digits than its factorization.

4221220305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156200.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4221220305 is about 64970.9189176204. The cubic root of 4221220305 is about 1616.1413403287.

Adding to 4221220305 its reverse (5030221224), we get a palindrome (9251441529).

The spelling of 4221220305 in words is "four billion, two hundred twenty-one million, two hundred twenty thousand, three hundred five".