1212212201212 has 12 divisors (see below), whose sum is σ = 2123305153200. Its totient is φ = 605553586016.

The previous prime is 1212212201203. The next prime is 1212212201219. The reversal of 1212212201212 is 2121022122121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212212201212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212201219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138123712 + ... + 138132487.

It is an arithmetic number, because the mean of its divisors is an integer number (176942096100).

Almost surely, 2^{1212212201212} is an apocalyptic number.

It is an amenable number.

1212212201212 is a deficient number, since it is larger than the sum of its proper divisors (911092951988).

1212212201212 is a wasteful number, since it uses less digits than its factorization.

1212212201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276257300 (or 276257298 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212212201212 its reverse (2121022122121), we get a palindrome (3333234323333).

The spelling of 1212212201212 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, two hundred twelve".