211311011999 has 2 divisors, whose sum is σ = 211311012000. Its totient is φ = 211311011998.

The previous prime is 211311011953. The next prime is 211311012001. The reversal of 211311011999 is 999110113112.

It is a happy number.

211311011999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211311011999 - 2¹⁶ = 211310946463 is a prime.

Together with 211311012001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211011011999) 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, 105655505999 + 105655506000.

It is an arithmetic number, because the mean of its divisors is an integer number (105655506000).

Almost surely, 2^211311011999 is an apocalyptic number.

211311011999 is a deficient number, since it is larger than the sum of its proper divisors (1).

211311011999 is an equidigital number, since it uses as much as digits as its factorization.

211311011999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 38.

The spelling of 211311011999 in words is "two hundred eleven billion, three hundred eleven million, eleven thousand, nine hundred ninety-nine".