213220541055209 has 2 divisors, whose sum is σ = 213220541055210. Its totient is φ = 213220541055208.

The previous prime is 213220541055187. The next prime is 213220541055289. The reversal of 213220541055209 is 902550145022312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184015736257600 + 29204804797609 = 13565240^2 + 5404147^2 .

It is a cyclic number.

It is not a de Polignac number, because 213220541055209 - 2¹² = 213220541051113 is a prime.

It is not a weakly prime, because it can be changed into another prime (213220541055289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610270527604 + 106610270527605.

It is an arithmetic number, because the mean of its divisors is an integer number (106610270527605).

Almost surely, 2^{213220541055209} is an apocalyptic number.

It is an amenable number.

213220541055209 is a deficient number, since it is larger than the sum of its proper divisors (1).

213220541055209 is an equidigital number, since it uses as much as digits as its factorization.

213220541055209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 213220541055209 in words is "two hundred thirteen trillion, two hundred twenty billion, five hundred forty-one million, fifty-five thousand, two hundred nine".