11321212211 has 2 divisors, whose sum is σ = 11321212212. Its totient is φ = 11321212210.

The previous prime is 11321212171. The next prime is 11321212267. The reversal of 11321212211 is 11221212311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11321212211 - 2²⁶ = 11254103347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11321212211.

It is not a weakly prime, because it can be changed into another prime (11321211211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660606105 + 5660606106.

It is an arithmetic number, because the mean of its divisors is an integer number (5660606106).

Almost surely, 2^11321212211 is an apocalyptic number.

11321212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321212211 is an equidigital number, since it uses as much as digits as its factorization.

11321212211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 17.

Adding to 11321212211 its reverse (11221212311), we get a palindrome (22542424522).

The spelling of 11321212211 in words is "eleven billion, three hundred twenty-one million, two hundred twelve thousand, two hundred eleven".