111312131212 has 12 divisors (see below), whose sum is σ = 194799703896. Its totient is φ = 55655072960.

The previous prime is 111312131207. The next prime is 111312131219. The reversal of 111312131212 is 212131213111.

It is a self number, because there is not a number n which added to its sum of digits gives 111312131212.

It is not an unprimeable number, because it can be changed into a prime (111312131219) 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, 41787 + ... + 473677.

It is an arithmetic number, because the mean of its divisors is an integer number (16233308658).

Almost surely, 2^111312131212 is an apocalyptic number.

It is an amenable number.

111312131212 is a deficient number, since it is larger than the sum of its proper divisors (83487572684).

111312131212 is a wasteful number, since it uses less digits than its factorization.

111312131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496328 (or 496326 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

Adding to 111312131212 its reverse (212131213111), we get a palindrome (323443344323).

The spelling of 111312131212 in words is "one hundred eleven billion, three hundred twelve million, one hundred thirty-one thousand, two hundred twelve".