3243212221 has 4 divisors (see below), whose sum is σ = 3384221472. Its totient is φ = 3102202972.

The previous prime is 3243212197. The next prime is 3243212233. The reversal of 3243212221 is 1222123423.

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.

It is a cyclic number.

It is not a de Polignac number, because 3243212221 - 2¹⁵ = 3243179453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3243212192 and 3243212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3243210221) 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, 70504591 + ... + 70504636.

It is an arithmetic number, because the mean of its divisors is an integer number (846055368).

Almost surely, 2^3243212221 is an apocalyptic number.

It is an amenable number.

3243212221 is a deficient number, since it is larger than the sum of its proper divisors (141009251).

3243212221 is a wasteful number, since it uses less digits than its factorization.

3243212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141009250.

The product of its digits is 1152, while the sum is 22.

The square root of 3243212221 is about 56949.2073781541. The cubic root of 3243212221 is about 1480.2160965504.

Adding to 3243212221 its reverse (1222123423), we get a palindrome (4465335644).

The spelling of 3243212221 in words is "three billion, two hundred forty-three million, two hundred twelve thousand, two hundred twenty-one".