1212112210218 has 192 divisors, whose sum is σ = 3201621147648. Its totient is φ = 302782112640.

The previous prime is 1212112210201. The next prime is 1212112210247. The reversal of 1212112210218 is 8120122112121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5459821 + ... + 5677487.

It is an arithmetic number, because the mean of its divisors is an integer number (16675110144).

Almost surely, 2^{1212112210218} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212112210218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600810573824).

1212112210218 is an abundant number, since it is smaller than the sum of its proper divisors (1989508937430).

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

1212112210218 is a wasteful number, since it uses less digits than its factorization.

1212112210218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217777 (or 217770 counting only the distinct ones).

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

Adding to 1212112210218 its reverse (8120122112121), we get a palindrome (9332234322339).

The spelling of 1212112210218 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred ten thousand, two hundred eighteen".