211321220233 has 2 divisors, whose sum is σ = 211321220234. Its totient is φ = 211321220232.

The previous prime is 211321220203. The next prime is 211321220251. The reversal of 211321220233 is 332022123112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178094128144 + 33227092089 = 422012^2 + 182283^2 .

It is a cyclic number.

It is not a de Polignac number, because 211321220233 - 2²⁵ = 211287665801 is a prime.

It is not a weakly prime, because it can be changed into another prime (211321220203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660610116 + 105660610117.

It is an arithmetic number, because the mean of its divisors is an integer number (105660610117).

Almost surely, 2^211321220233 is an apocalyptic number.

It is an amenable number.

211321220233 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321220233 is an equidigital number, since it uses as much as digits as its factorization.

211321220233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 211321220233 its reverse (332022123112), we get a palindrome (543343343345).

The spelling of 211321220233 in words is "two hundred eleven billion, three hundred twenty-one million, two hundred twenty thousand, two hundred thirty-three".