212021033321 has 2 divisors, whose sum is σ = 212021033322. Its totient is φ = 212021033320.

The previous prime is 212021033317. The next prime is 212021033333. The reversal of 212021033321 is 123330120212.

212021033321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211692010000 + 329023321 = 460100^2 + 18139^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021033321 - 2² = 212021033317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021033293 and 212021033302.

It is not a weakly prime, because it can be changed into another prime (212021003321) 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, 106010516660 + 106010516661.

It is an arithmetic number, because the mean of its divisors is an integer number (106010516661).

Almost surely, 2^212021033321 is an apocalyptic number.

It is an amenable number.

212021033321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021033321 is an equidigital number, since it uses as much as digits as its factorization.

212021033321 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 20.

Adding to 212021033321 its reverse (123330120212), we get a palindrome (335351153533).

The spelling of 212021033321 in words is "two hundred twelve billion, twenty-one million, thirty-three thousand, three hundred twenty-one".