4217312221 has 8 divisors (see below), whose sum is σ = 4273315200. Its totient is φ = 4161374880.

The previous prime is 4217312189. The next prime is 4217312243. The reversal of 4217312221 is 1222137124.

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 4217312221 - 2⁵ = 4217312189 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 (4217312251) 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, 120450 + ... + 151468.

It is an arithmetic number, because the mean of its divisors is an integer number (534164400).

Almost surely, 2^4217312221 is an apocalyptic number.

It is an amenable number.

4217312221 is a deficient number, since it is larger than the sum of its proper divisors (56002979).

4217312221 is a wasteful number, since it uses less digits than its factorization.

4217312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32819.

The product of its digits is 1344, while the sum is 25.

The square root of 4217312221 is about 64940.8363127547. The cubic root of 4217312221 is about 1615.6424351289.

Adding to 4217312221 its reverse (1222137124), we get a palindrome (5439449345).

The spelling of 4217312221 in words is "four billion, two hundred seventeen million, three hundred twelve thousand, two hundred twenty-one".