12001221101011 has 2 divisors, whose sum is σ = 12001221101012. Its totient is φ = 12001221101010.

The previous prime is 12001221100951. The next prime is 12001221101047. The reversal of 12001221101011 is 11010112210021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12001221101011 - 2⁹ = 12001221100499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001221100982 and 12001221101000.

It is not a weakly prime, because it can be changed into another prime (12001221101071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000610550505 + 6000610550506.

It is an arithmetic number, because the mean of its divisors is an integer number (6000610550506).

Almost surely, 2^{12001221101011} is an apocalyptic number.

12001221101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001221101011 is an equidigital number, since it uses as much as digits as its factorization.

12001221101011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12001221101011 its reverse (11010112210021), we get a palindrome (23011333311032).

The spelling of 12001221101011 in words is "twelve trillion, one billion, two hundred twenty-one million, one hundred one thousand, eleven".