211111222218 has 16 divisors (see below), whose sum is σ = 454701094176. Its totient is φ = 64957299120.

The previous prime is 211111222151. The next prime is 211111222219. The reversal of 211111222218 is 812222111112.

It is not an unprimeable number, because it can be changed into a prime (211111222219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353276988 + ... + 1353277143.

It is an arithmetic number, because the mean of its divisors is an integer number (28418818386).

Almost surely, 2^211111222218 is an apocalyptic number.

211111222218 is an abundant number, since it is smaller than the sum of its proper divisors (243589871958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111222218 is a wasteful number, since it uses less digits than its factorization.

211111222218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706554149.

The product of its digits is 256, while the sum is 24.

The spelling of 211111222218 in words is "two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred eighteen".