212012021218 has 16 divisors (see below), whose sum is σ = 331855070976. Its totient is φ = 101393946720.

The previous prime is 212012021197. The next prime is 212012021219. The reversal of 212012021218 is 812120210212.

It is not an unprimeable number, because it can be changed into a prime (212012021219) 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, 2309863 + ... + 2399893.

It is an arithmetic number, because the mean of its divisors is an integer number (20740941936).

Almost surely, 2^212012021218 is an apocalyptic number.

212012021218 is a deficient number, since it is larger than the sum of its proper divisors (119843049758).

212012021218 is a wasteful number, since it uses less digits than its factorization.

212012021218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141249.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 212012021218 in words is "two hundred twelve billion, twelve million, twenty-one thousand, two hundred eighteen".