2133220321 has 2 divisors, whose sum is σ = 2133220322. Its totient is φ = 2133220320.

The previous prime is 2133220319. The next prime is 2133220357. The reversal of 2133220321 is 1230223312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2069795025 + 63425296 = 45495^2 + 7964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133220321 - 2¹ = 2133220319 is a prime.

Together with 2133220319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2133224321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066610160 + 1066610161.

It is an arithmetic number, because the mean of its divisors is an integer number (1066610161).

Almost surely, 2^2133220321 is an apocalyptic number.

It is an amenable number.

2133220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133220321 is an equidigital number, since it uses as much as digits as its factorization.

2133220321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2133220321 is about 46186.7981245724. The cubic root of 2133220321 is about 1287.2964473627.

Adding to 2133220321 its reverse (1230223312), we get a palindrome (3363443633).

The spelling of 2133220321 in words is "two billion, one hundred thirty-three million, two hundred twenty thousand, three hundred twenty-one".