111212312012 has 12 divisors (see below), whose sum is σ = 194993675016. Its totient is φ = 55499833440.

The previous prime is 111212312009. The next prime is 111212312033. The reversal of 111212312012 is 210213212111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26578289 + ... + 26582472.

It is an arithmetic number, because the mean of its divisors is an integer number (16249472918).

Almost surely, 2^111212312012 is an apocalyptic number.

It is an amenable number.

111212312012 is a deficient number, since it is larger than the sum of its proper divisors (83781363004).

111212312012 is a wasteful number, since it uses less digits than its factorization.

111212312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53161288 (or 53161286 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111212312012 its reverse (210213212111), we get a palindrome (321425524123).

Subtracting 111212312012 from its reverse (210213212111), we obtain a palindrome (99000900099).

The spelling of 111212312012 in words is "one hundred eleven billion, two hundred twelve million, three hundred twelve thousand, twelve".