12211212011212 has 12 divisors (see below), whose sum is σ = 21369722826816. Its totient is φ = 6105576917840.

The previous prime is 12211212011149. The next prime is 12211212011213. The reversal of 12211212011212 is 21211021211221.

It is a happy number.

It is a super-2 number, since 2×12211212011212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211212011212.

It is not an unprimeable number, because it can be changed into a prime (12211212011213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6313339 + ... + 8017522.

It is an arithmetic number, because the mean of its divisors is an integer number (1780810235568).

Almost surely, 2^{12211212011212} is an apocalyptic number.

It is an amenable number.

12211212011212 is a deficient number, since it is larger than the sum of its proper divisors (9158510815604).

12211212011212 is a wasteful number, since it uses less digits than its factorization.

12211212011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14543888 (or 14543886 counting only the distinct ones).

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

Adding to 12211212011212 its reverse (21211021211221), we get a palindrome (33422233222433).

The spelling of 12211212011212 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, eleven thousand, two hundred twelve".