12121112212 has 48 divisors (see below), whose sum is σ = 23408461440. Its totient is φ = 5445936000.

The previous prime is 12121112207. The next prime is 12121112239. The reversal of 12121112212 is 21221112121.

It is a super-2 number, since 2×12121112212² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

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, 3148873 + ... + 3152719.

It is an arithmetic number, because the mean of its divisors is an integer number (487676280).

Almost surely, 2^12121112212 is an apocalyptic number.

It is an amenable number.

12121112212 is a deficient number, since it is larger than the sum of its proper divisors (11287349228).

12121112212 is a wasteful number, since it uses less digits than its factorization.

12121112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672 (or 4670 counting only the distinct ones).

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

Adding to 12121112212 its reverse (21221112121), we get a palindrome (33342224333).

Subtracting 12121112212 from its reverse (21221112121), we obtain a palindrome (9099999909).

The spelling of 12121112212 in words is "twelve billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twelve".