11211211020211 has 2 divisors, whose sum is σ = 11211211020212. Its totient is φ = 11211211020210.

The previous prime is 11211211020199. The next prime is 11211211020221. The reversal of 11211211020211 is 11202011211211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211211020211 - 2²⁵ = 11211177465779 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211211020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605605510105 + 5605605510106.

It is an arithmetic number, because the mean of its divisors is an integer number (5605605510106).

Almost surely, 2^{11211211020211} is an apocalyptic number.

11211211020211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211211020211 is an equidigital number, since it uses as much as digits as its factorization.

11211211020211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11211211020211 its reverse (11202011211211), we get a palindrome (22413222231422).

The spelling of 11211211020211 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, twenty thousand, two hundred eleven".