12121211121212 has 6 divisors (see below), whose sum is σ = 21212119462128. Its totient is φ = 6060605560604.

The previous prime is 12121211121203. The next prime is 12121211121241. The reversal of 12121211121212 is 21212111212121.

It is a happy number.

12121211121212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×12121211121212³ (a number of 40 digits) contains 333 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 polite number, since it can be written as a sum of consecutive naturals, namely, 1515151390148 + ... + 1515151390155.

It is an arithmetic number, because the mean of its divisors is an integer number (3535353243688).

Almost surely, 2^{12121211121212} is an apocalyptic number.

It is an amenable number.

12121211121212 is a deficient number, since it is larger than the sum of its proper divisors (9090908340916).

12121211121212 is a wasteful number, since it uses less digits than its factorization.

12121211121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030302780307 (or 3030302780305 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 12121211121212 its reverse (21212111212121), we get a palindrome (33333322333333).

Subtracting 12121211121212 from its reverse (21212111212121), we obtain a palindrome (9090900090909).

The spelling of 12121211121212 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twelve".