212121212212012 has 48 divisors (see below), whose sum is σ = 402311959267680. Its totient is φ = 97530171379200.

The previous prime is 212121212211929. The next prime is 212121212212027. The reversal of 212121212212012 is 210212212121212.

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 15 ways as a sum of consecutive naturals, for example, 172164939 + ... + 173392642.

It is an arithmetic number, because the mean of its divisors is an integer number (8381499151410).

Almost surely, 2^{212121212212012} is an apocalyptic number.

It is an amenable number.

212121212212012 is a deficient number, since it is larger than the sum of its proper divisors (190190747055668).

212121212212012 is a wasteful number, since it uses less digits than its factorization.

212121212212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345557842 (or 345557840 counting only the distinct ones).

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

Adding to 212121212212012 its reverse (210212212121212), we get a palindrome (422333424333224).

The spelling of 212121212212012 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, twelve".