212218995818 has 8 divisors (see below), whose sum is σ = 318396628548. Its totient is φ = 106086786304.

The previous prime is 212218995799. The next prime is 212218995871. The reversal of 212218995818 is 818599812212.

212218995818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 153074215009 + 59144780809 = 391247^2 + 243197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 11344121 + ... + 11362812.

Almost surely, 2^212218995818 is an apocalyptic number.

212218995818 is a deficient number, since it is larger than the sum of its proper divisors (106177632730).

212218995818 is a wasteful number, since it uses less digits than its factorization.

212218995818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22711608.

The product of its digits is 1658880, while the sum is 56.

The spelling of 212218995818 in words is "two hundred twelve billion, two hundred eighteen million, nine hundred ninety-five thousand, eight hundred eighteen".