211210211121911 has 2 divisors, whose sum is σ = 211210211121912. Its totient is φ = 211210211121910.

The previous prime is 211210211121887. The next prime is 211210211122013. The reversal of 211210211121911 is 119121112012112.

211210211121911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211210211121911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211210211121211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605105560955 + 105605105560956.

It is an arithmetic number, because the mean of its divisors is an integer number (105605105560956).

Almost surely, 2^{211210211121911} is an apocalyptic number.

211210211121911 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210211121911 is an equidigital number, since it uses as much as digits as its factorization.

211210211121911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 26.

The spelling of 211210211121911 in words is "two hundred eleven trillion, two hundred ten billion, two hundred eleven million, one hundred twenty-one thousand, nine hundred eleven".