12212121121212 has 24 divisors (see below), whose sum is σ = 28495348604800. Its totient is φ = 4070649994416.

The previous prime is 12212121121169. The next prime is 12212121121247. The reversal of 12212121121212 is 21212112121221.

12212121121212 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6234262 + ... + 7955517.

Almost surely, 2^{12212121121212} is an apocalyptic number.

12212121121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212121121212 is an abundant number, since it is smaller than the sum of its proper divisors (16283227483588).

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

12212121121212 is a wasteful number, since it uses less digits than its factorization.

12212121121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261505 (or 14261503 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 12212121121212 its reverse (21212112121221), we get a palindrome (33424233242433).

The spelling of 12212121121212 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".