213130663321 has 2 divisors, whose sum is σ = 213130663322. Its totient is φ = 213130663320.

The previous prime is 213130663303. The next prime is 213130663349. The reversal of 213130663321 is 123366031312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206883974025 + 6246689296 = 454845^2 + 79036^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130663321 - 2¹⁷ = 213130532249 is a prime.

It is not a weakly prime, because it can be changed into another prime (213130613321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565331660 + 106565331661.

It is an arithmetic number, because the mean of its divisors is an integer number (106565331661).

Almost surely, 2^213130663321 is an apocalyptic number.

It is an amenable number.

213130663321 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130663321 is an equidigital number, since it uses as much as digits as its factorization.

213130663321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

Adding to 213130663321 its reverse (123366031312), we get a palindrome (336496694633).

The spelling of 213130663321 in words is "two hundred thirteen billion, one hundred thirty million, six hundred sixty-three thousand, three hundred twenty-one".