4221420505 has 16 divisors (see below), whose sum is σ = 5233218048. Its totient is φ = 3265632000.

The previous prime is 4221420493. The next prime is 4221420527. The reversal of 4221420505 is 5050241224.

It is not a de Polignac number, because 4221420505 - 2⁷ = 4221420377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221420505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200950 + ... + 220960.

It is an arithmetic number, because the mean of its divisors is an integer number (327076128).

Almost surely, 2^4221420505 is an apocalyptic number.

It is an amenable number.

4221420505 is a deficient number, since it is larger than the sum of its proper divisors (1011797543).

4221420505 is a wasteful number, since it uses less digits than its factorization.

4221420505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21408.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 4221420505 is about 64972.4595886596. The cubic root of 4221420505 is about 1616.1668895268.

Adding to 4221420505 its reverse (5050241224), we get a palindrome (9271661729).

The spelling of 4221420505 in words is "four billion, two hundred twenty-one million, four hundred twenty thousand, five hundred five".