211218903859 has 2 divisors, whose sum is σ = 211218903860. Its totient is φ = 211218903858.

The previous prime is 211218903781. The next prime is 211218903871. The reversal of 211218903859 is 958309812112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211218903859 - 2²³ = 211210515251 is a prime.

It is a super-2 number, since 2×211218903859² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211218904859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105609451929 + 105609451930.

It is an arithmetic number, because the mean of its divisors is an integer number (105609451930).

Almost surely, 2^211218903859 is an apocalyptic number.

211218903859 is a deficient number, since it is larger than the sum of its proper divisors (1).

211218903859 is an equidigital number, since it uses as much as digits as its factorization.

211218903859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 211218903859 in words is "two hundred eleven billion, two hundred eighteen million, nine hundred three thousand, eight hundred fifty-nine".