212003321 has 2 divisors, whose sum is σ = 212003322. Its totient is φ = 212003320.

The previous prime is 212003317. The next prime is 212003357. The reversal of 212003321 is 123300212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207676921 + 4326400 = 14411^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 212003321 - 2² = 212003317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212003296 and 212003305.

It is not a weakly prime, because it can be changed into another prime (212009321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001660 + 106001661.

It is an arithmetic number, because the mean of its divisors is an integer number (106001661).

Almost surely, 2^212003321 is an apocalyptic number.

It is an amenable number.

212003321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212003321 is an equidigital number, since it uses as much as digits as its factorization.

212003321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 212003321 is about 14560.3338217226. Note that the first 3 decimals coincide. The cubic root of 212003321 is about 596.2763093167.

Adding to 212003321 its reverse (123300212), we get a palindrome (335303533).

The spelling of 212003321 in words is "two hundred twelve million, three thousand, three hundred twenty-one".