12121201212212 has 24 divisors (see below), whose sum is σ = 21706007459136. Its totient is φ = 5919492595968.

The previous prime is 12121201212191. The next prime is 12121201212259. The reversal of 12121201212212 is 21221210212121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5378633 + ... + 7291919.

It is an arithmetic number, because the mean of its divisors is an integer number (904416977464).

Almost surely, 2^{12121201212212} is an apocalyptic number.

It is an amenable number.

12121201212212 is a deficient number, since it is larger than the sum of its proper divisors (9584806246924).

12121201212212 is a wasteful number, since it uses less digits than its factorization.

12121201212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950167 (or 1950165 counting only the distinct ones).

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

Adding to 12121201212212 its reverse (21221210212121), we get a palindrome (33342411424333).

The spelling of 12121201212212 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, two hundred twelve".