11121212012212 has 12 divisors (see below), whose sum is σ = 19496689623936. Its totient is φ = 5550729262520.

The previous prime is 11121212012203. The next prime is 11121212012243. The reversal of 11121212012212 is 21221021212111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121212012212.

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 3 ways as a sum of consecutive naturals, for example, 2469183364 + ... + 2469187867.

It is an arithmetic number, because the mean of its divisors is an integer number (1624724135328).

Almost surely, 2^{11121212012212} is an apocalyptic number.

It is an amenable number.

11121212012212 is a deficient number, since it is larger than the sum of its proper divisors (8375477611724).

11121212012212 is a wasteful number, since it uses less digits than its factorization.

11121212012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938371798 (or 4938371796 counting only the distinct ones).

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

Adding to 11121212012212 its reverse (21221021212111), we get a palindrome (32342233224323).

The spelling of 11121212012212 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, twelve thousand, two hundred twelve".