121212110212 has 96 divisors (see below), whose sum is σ = 236350033920. Its totient is φ = 54175806720.

The previous prime is 121212110209. The next prime is 121212110213. The reversal of 121212110212 is 212011212121.

It is not an unprimeable number, because it can be changed into a prime (121212110213) 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, 13796373 + ... + 13805155.

It is an arithmetic number, because the mean of its divisors is an integer number (2461979520).

Almost surely, 2^121212110212 is an apocalyptic number.

It is an amenable number.

121212110212 is a deficient number, since it is larger than the sum of its proper divisors (115137923708).

121212110212 is a wasteful number, since it uses less digits than its factorization.

121212110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8993 (or 8991 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121212110212 its reverse (212011212121), we get a palindrome (333223322333).

The spelling of 121212110212 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, two hundred twelve".