212021110321 has 2 divisors, whose sum is σ = 212021110322. Its totient is φ = 212021110320.

The previous prime is 212021110303. The next prime is 212021110393. The reversal of 212021110321 is 123011120212.

212021110321 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., 146861400625 + 65159709696 = 383225^2 + 255264^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021110321 - 2¹⁵ = 212021077553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021110295 and 212021110304.

It is not a weakly prime, because it can be changed into another prime (212021110421) 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, 106010555160 + 106010555161.

It is an arithmetic number, because the mean of its divisors is an integer number (106010555161).

Almost surely, 2^212021110321 is an apocalyptic number.

It is an amenable number.

212021110321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021110321 is an equidigital number, since it uses as much as digits as its factorization.

212021110321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212021110321 its reverse (123011120212), we get a palindrome (335032230533).

The spelling of 212021110321 in words is "two hundred twelve billion, twenty-one million, one hundred ten thousand, three hundred twenty-one".