12121210868 has 96 divisors (see below), whose sum is σ = 24715756800. Its totient is φ = 5151246336.

The previous prime is 12121210861. The next prime is 12121210879. The reversal of 12121210868 is 86801212121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121210861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14446793 + ... + 14447631.

It is an arithmetic number, because the mean of its divisors is an integer number (257455800).

Almost surely, 2^12121210868 is an apocalyptic number.

It is an amenable number.

12121210868 is an abundant number, since it is smaller than the sum of its proper divisors (12594545932).

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

12121210868 is a wasteful number, since it uses less digits than its factorization.

12121210868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

Adding to 12121210868 its reverse (86801212121), we get a palindrome (98922422989).

The spelling of 12121210868 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, eight hundred sixty-eight".