3221212243 has 4 divisors (see below), whose sum is σ = 3226416760. Its totient is φ = 3216007728.

The previous prime is 3221212237. The next prime is 3221212279. The reversal of 3221212243 is 3422121223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422121223 = 32381 ⋅105683.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3221212243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221212213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2601330 + ... + 2602567.

It is an arithmetic number, because the mean of its divisors is an integer number (806604190).

Almost surely, 2^3221212243 is an apocalyptic number.

3221212243 is a deficient number, since it is larger than the sum of its proper divisors (5204517).

3221212243 is an equidigital number, since it uses as much as digits as its factorization.

3221212243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204516.

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

The square root of 3221212243 is about 56755.7243192262. The cubic root of 3221212243 is about 1476.8615382534.

Adding to 3221212243 its reverse (3422121223), we get a palindrome (6643333466).

The spelling of 3221212243 in words is "three billion, two hundred twenty-one million, two hundred twelve thousand, two hundred forty-three".