3221221313 has 4 divisors (see below), whose sum is σ = 3332297940. Its totient is φ = 3110144688.

The previous prime is 3221221309. The next prime is 3221221337. The reversal of 3221221313 is 3131221223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1132457104 + 2088764209 = 33652^2 + 45703^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221221313 - 2² = 3221221309 is a prime.

It is a super-3 number, since 3×3221221313³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221220313) 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, 55538270 + ... + 55538327.

It is an arithmetic number, because the mean of its divisors is an integer number (833074485).

Almost surely, 2^3221221313 is an apocalyptic number.

It is an amenable number.

3221221313 is a deficient number, since it is larger than the sum of its proper divisors (111076627).

3221221313 is a wasteful number, since it uses less digits than its factorization.

3221221313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111076626.

The product of its digits is 432, while the sum is 20.

The square root of 3221221313 is about 56755.8042230044. The cubic root of 3221221313 is about 1476.8629243901.

Adding to 3221221313 its reverse (3131221223), we get a palindrome (6352442536).

The spelling of 3221221313 in words is "three billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred thirteen".