213012203321 has 2 divisors, whose sum is σ = 213012203322. Its totient is φ = 213012203320.

The previous prime is 213012203291. The next prime is 213012203407. The reversal of 213012203321 is 123302210312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208539268921 + 4472934400 = 456661^2 + 66880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213012203321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213012203293 and 213012203302.

It is not a weakly prime, because it can be changed into another prime (213012103321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106506101660 + 106506101661.

It is an arithmetic number, because the mean of its divisors is an integer number (106506101661).

Almost surely, 2^213012203321 is an apocalyptic number.

It is an amenable number.

213012203321 is a deficient number, since it is larger than the sum of its proper divisors (1).

213012203321 is an equidigital number, since it uses as much as digits as its factorization.

213012203321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213012203321 its reverse (123302210312), we get a palindrome (336314413633).

The spelling of 213012203321 in words is "two hundred thirteen billion, twelve million, two hundred three thousand, three hundred twenty-one".