211013517855911 has 2 divisors, whose sum is σ = 211013517855912. Its totient is φ = 211013517855910.

The previous prime is 211013517855851. The next prime is 211013517855913. The reversal of 211013517855911 is 119558715310112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211013517855911 is a prime.

Together with 211013517855913, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211013517855911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211013517855913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506758927955 + 105506758927956.

It is an arithmetic number, because the mean of its divisors is an integer number (105506758927956).

Almost surely, 2^{211013517855911} is an apocalyptic number.

211013517855911 is a deficient number, since it is larger than the sum of its proper divisors (1).

211013517855911 is an equidigital number, since it uses as much as digits as its factorization.

211013517855911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 50.

The spelling of 211013517855911 in words is "two hundred eleven trillion, thirteen billion, five hundred seventeen million, eight hundred fifty-five thousand, nine hundred eleven".