12011211221011 has 2 divisors, whose sum is σ = 12011211221012. Its totient is φ = 12011211221010.

The previous prime is 12011211220999. The next prime is 12011211221029. The reversal of 12011211221011 is 11012211211021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011211221011 - 2⁹ = 12011211220499 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011211221111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005605610505 + 6005605610506.

It is an arithmetic number, because the mean of its divisors is an integer number (6005605610506).

Almost surely, 2^{12011211221011} is an apocalyptic number.

12011211221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011211221011 is an equidigital number, since it uses as much as digits as its factorization.

12011211221011 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 12011211221011 its reverse (11012211211021), we get a palindrome (23023422432032).

The spelling of 12011211221011 in words is "twelve trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, eleven".