11211122012011 has 2 divisors, whose sum is σ = 11211122012012. Its totient is φ = 11211122012010.

The previous prime is 11211122012009. The next prime is 11211122012087. The reversal of 11211122012011 is 11021022111211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11211122012011 - 2¹ = 11211122012009 is a prime.

Together with 11211122012009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11211122012411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605561006005 + 5605561006006.

It is an arithmetic number, because the mean of its divisors is an integer number (5605561006006).

Almost surely, 2^{11211122012011} is an apocalyptic number.

11211122012011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211122012011 is an equidigital number, since it uses as much as digits as its factorization.

11211122012011 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 11211122012011 its reverse (11021022111211), we get a palindrome (22232144123222).

The spelling of 11211122012011 in words is "eleven trillion, two hundred eleven billion, one hundred twenty-two million, twelve thousand, eleven".