3133331221 has 8 divisors (see below), whose sum is σ = 3207592224. Its totient is φ = 3059631120.

The previous prime is 3133331171. The next prime is 3133331237. The reversal of 3133331221 is 1221333313.

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 3133331221 - 2⁹ = 3133330709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3133331192 and 3133331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3133391221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128911 + ... + 151276.

It is an arithmetic number, because the mean of its divisors is an integer number (400949028).

Almost surely, 2^3133331221 is an apocalyptic number.

It is an amenable number.

3133331221 is a deficient number, since it is larger than the sum of its proper divisors (74261003).

3133331221 is a wasteful number, since it uses less digits than its factorization.

3133331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280451.

The product of its digits is 972, while the sum is 22.

The square root of 3133331221 is about 55976.1665443428. The cubic root of 3133331221 is about 1463.3069502574.

Adding to 3133331221 its reverse (1221333313), we get a palindrome (4354664534).

The spelling of 3133331221 in words is "three billion, one hundred thirty-three million, three hundred thirty-one thousand, two hundred twenty-one".