12120212121212 has 24 divisors (see below), whose sum is σ = 22842050683536. Its totient is φ = 5593916515968.

The previous prime is 12120212121187. The next prime is 12120212121217. The reversal of 12120212121212 is 21212121202121.

12120212121212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120212121217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13272443 + ... + 14156205.

It is an arithmetic number, because the mean of its divisors is an integer number (951752111814).

Almost surely, 2^{12120212121212} is an apocalyptic number.

It is an amenable number.

12120212121212 is a deficient number, since it is larger than the sum of its proper divisors (10721838562324).

12120212121212 is a wasteful number, since it uses less digits than its factorization.

12120212121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147517 (or 1147515 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12120212121212 its reverse (21212121202121), we get a palindrome (33332333323333).

The spelling of 12120212121212 in words is "twelve trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twelve".