213221203211 has 2 divisors, whose sum is σ = 213221203212. Its totient is φ = 213221203210.

The previous prime is 213221203171. The next prime is 213221203289. The reversal of 213221203211 is 112302122312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213221203211 is a prime.

It is not a weakly prime, because it can be changed into another prime (213221223211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610601605 + 106610601606.

It is an arithmetic number, because the mean of its divisors is an integer number (106610601606).

Almost surely, 2^213221203211 is an apocalyptic number.

213221203211 is a deficient number, since it is larger than the sum of its proper divisors (1).

213221203211 is an equidigital number, since it uses as much as digits as its factorization.

213221203211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 213221203211 its reverse (112302122312), we get a palindrome (325523325523).

The spelling of 213221203211 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred three thousand, two hundred eleven".