12011221199911 has 2 divisors, whose sum is σ = 12011221199912. Its totient is φ = 12011221199910.

The previous prime is 12011221199909. The next prime is 12011221199977. The reversal of 12011221199911 is 11999112211021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011221199911 - 2¹ = 12011221199909 is a prime.

Together with 12011221199909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011221199011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005610599955 + 6005610599956.

It is an arithmetic number, because the mean of its divisors is an integer number (6005610599956).

Almost surely, 2^{12011221199911} is an apocalyptic number.

12011221199911 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011221199911 is an equidigital number, since it uses as much as digits as its factorization.

12011221199911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 12011221199911 in words is "twelve trillion, eleven billion, two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred eleven".