211421023321 has 2 divisors, whose sum is σ = 211421023322. Its totient is φ = 211421023320.

The previous prime is 211421023313. The next prime is 211421023343. The reversal of 211421023321 is 123320124112.

211421023321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (211421023343) can be obtained adding 211421023321 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205118410000 + 6302613321 = 452900^2 + 79389^2 .

It is a cyclic number.

It is not a de Polignac number, because 211421023321 - 2³ = 211421023313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211421023292 and 211421023301.

It is not a weakly prime, because it can be changed into another prime (211421023921) 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, 105710511660 + 105710511661.

It is an arithmetic number, because the mean of its divisors is an integer number (105710511661).

Almost surely, 2^211421023321 is an apocalyptic number.

It is an amenable number.

211421023321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211421023321 is an equidigital number, since it uses as much as digits as its factorization.

211421023321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 211421023321 its reverse (123320124112), we get a palindrome (334741147433).

The spelling of 211421023321 in words is "two hundred eleven billion, four hundred twenty-one million, twenty-three thousand, three hundred twenty-one".