12211111121212 has 24 divisors (see below), whose sum is σ = 21386014329456. Its totient is φ = 6100821979008.

The previous prime is 12211111121197. The next prime is 12211111121249. The reversal of 12211111121212 is 21212111111221.

It is a super-2 number, since 2×12211111121212² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12211111121212.

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, 80785818 + ... + 80936830.

It is an arithmetic number, because the mean of its divisors is an integer number (891083930394).

Almost surely, 2^{12211111121212} is an apocalyptic number.

It is an amenable number.

12211111121212 is a deficient number, since it is larger than the sum of its proper divisors (9174903208244).

12211111121212 is a wasteful number, since it uses less digits than its factorization.

12211111121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166557 (or 166555 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

Adding to 12211111121212 its reverse (21212111111221), we get a palindrome (33423222232433).

Subtracting 12211111121212 from its reverse (21212111111221), we obtain a palindrome (9000999990009).

The spelling of 12211111121212 in words is "twelve trillion, two hundred eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".