212011220122218 has 64 divisors (see below), whose sum is σ = 514224483004800. Its totient is φ = 64213588183680.

The previous prime is 212011220122217. The next prime is 212011220122283. The reversal of 212011220122218 is 812221022110212.

It is a happy number.

212011220122218 is a `hidden beast` number, since 2 + 1 + 201 + 1 + 220 + 1 + 22 + 218 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 212011220122191 and 212011220122200.

It is not an unprimeable number, because it can be changed into a prime (212011220122217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88359873 + ... + 90727556.

It is an arithmetic number, because the mean of its divisors is an integer number (8034757546950).

Almost surely, 2^{212011220122218} is an apocalyptic number.

212011220122218 is an abundant number, since it is smaller than the sum of its proper divisors (302213262882582).

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

212011220122218 is a wasteful number, since it uses less digits than its factorization.

212011220122218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179089444 (or 179089438 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The spelling of 212011220122218 in words is "two hundred twelve trillion, eleven billion, two hundred twenty million, one hundred twenty-two thousand, two hundred eighteen".