214021321 has 2 divisors, whose sum is σ = 214021322. Its totient is φ = 214021320.

The previous prime is 214021307. The next prime is 214021337. The reversal of 214021321 is 123120412.

It is an a-pointer prime, because the next prime (214021337) can be obtained adding 214021321 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107931321 + 106090000 = 10389^2 + 10300^2 .

It is a cyclic number.

It is not a de Polignac number, because 214021321 - 2⁹ = 214020809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214021295 and 214021304.

It is not a weakly prime, because it can be changed into another prime (214021921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107010660 + 107010661.

It is an arithmetic number, because the mean of its divisors is an integer number (107010661).

Almost surely, 2^214021321 is an apocalyptic number.

It is an amenable number.

214021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

214021321 is an equidigital number, since it uses as much as digits as its factorization.

214021321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 214021321 is about 14629.4675569550. The cubic root of 214021321 is about 598.1622667893.

Adding to 214021321 its reverse (123120412), we get a palindrome (337141733).

Subtracting from 214021321 its reverse (123120412), we obtain a palindrome (90900909).

The spelling of 214021321 in words is "two hundred fourteen million, twenty-one thousand, three hundred twenty-one".