3133221221 has 8 divisors (see below), whose sum is σ = 3375654744. Its totient is φ = 2890990080.

The previous prime is 3133221149. The next prime is 3133221233. The reversal of 3133221221 is 1221223313.

It can be written as a sum of positive squares in 4 ways, for example, as 370562500 + 2762658721 = 19250^2 + 52561^2 .

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 3133221221 - 2¹⁰ = 3133220197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3133221193 and 3133221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3133221121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17636 + ... + 81101.

It is an arithmetic number, because the mean of its divisors is an integer number (421956843).

Almost surely, 2^3133221221 is an apocalyptic number.

It is an amenable number.

3133221221 is a deficient number, since it is larger than the sum of its proper divisors (242433523).

3133221221 is a wasteful number, since it uses less digits than its factorization.

3133221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101191.

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

The square root of 3133221221 is about 55975.1839746865. The cubic root of 3133221221 is about 1463.2898262407.

Adding to 3133221221 its reverse (1221223313), we get a palindrome (4354444534).

The spelling of 3133221221 in words is "three billion, one hundred thirty-three million, two hundred twenty-one thousand, two hundred twenty-one".