111210220121212 has 12 divisors (see below), whose sum is σ = 198758691280800. Its totient is φ = 54422022612416.

The previous prime is 111210220121207. The next prime is 111210220121249. The reversal of 111210220121212 is 212121022012111.

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 111210220121212.

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, 295771861837 + ... + 295771862212.

It is an arithmetic number, because the mean of its divisors is an integer number (16563224273400).

Almost surely, 2^{111210220121212} is an apocalyptic number.

It is an amenable number.

111210220121212 is a deficient number, since it is larger than the sum of its proper divisors (87548471159588).

111210220121212 is a wasteful number, since it uses less digits than its factorization.

111210220121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591543724100 (or 591543724098 counting only the distinct ones).

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

Adding to 111210220121212 its reverse (212121022012111), we get a palindrome (323331242133323).

The spelling of 111210220121212 in words is "one hundred eleven trillion, two hundred ten billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".