3217001221 has 4 divisors (see below), whose sum is σ = 3676572832. Its totient is φ = 2757429612.

The previous prime is 3217001213. The next prime is 3217001231. The reversal of 3217001221 is 1221007123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1221007123 = 7 ⋅174429589.

It is not a de Polignac number, because 3217001221 - 2³ = 3217001213 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 (3217001201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229785795 + ... + 229785808.

It is an arithmetic number, because the mean of its divisors is an integer number (919143208).

Almost surely, 2^3217001221 is an apocalyptic number.

It is an amenable number.

3217001221 is a deficient number, since it is larger than the sum of its proper divisors (459571611).

3217001221 is an equidigital number, since it uses as much as digits as its factorization.

3217001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459571610.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 3217001221 is about 56718.6144136120. The cubic root of 3217001221 is about 1476.2177010931.

Adding to 3217001221 its reverse (1221007123), we get a palindrome (4438008344).

The spelling of 3217001221 in words is "three billion, two hundred seventeen million, one thousand, two hundred twenty-one".