12121211201212 has 6 divisors (see below), whose sum is σ = 21212119602128. Its totient is φ = 6060605600604.

The previous prime is 12121211201159. The next prime is 12121211201221. The reversal of 12121211201212 is 21210211212121.

It is a happy number.

12121211201212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12121211201212.

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, 1515151400148 + ... + 1515151400155.

Almost surely, 2^{12121211201212} is an apocalyptic number.

It is an amenable number.

12121211201212 is a deficient number, since it is larger than the sum of its proper divisors (9090908400916).

12121211201212 is a wasteful number, since it uses less digits than its factorization.

12121211201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030302800307 (or 3030302800305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121211201212 its reverse (21210211212121), we get a palindrome (33331422413333).

The spelling of 12121211201212 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, two hundred one thousand, two hundred twelve".