12121122212 has 24 divisors (see below), whose sum is σ = 21426231456. Its totient is φ = 5999427008.

The previous prime is 12121122203. The next prime is 12121122229. The reversal of 12121122212 is 21222112121.

12121122212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

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 7 ways as a sum of consecutive naturals, for example, 603443 + ... + 623205.

It is an arithmetic number, because the mean of its divisors is an integer number (892759644).

Almost surely, 2^12121122212 is an apocalyptic number.

It is an amenable number.

12121122212 is a deficient number, since it is larger than the sum of its proper divisors (9305109244).

12121122212 is a wasteful number, since it uses less digits than its factorization.

12121122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21307 (or 21305 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 12121122212 its reverse (21222112121), we get a palindrome (33343234333).

The spelling of 12121122212 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".