11311212012 has 24 divisors (see below), whose sum is σ = 27781924800. Its totient is φ = 3571961616.

The previous prime is 11311212007. The next prime is 11311212019. The reversal of 11311212012 is 21021211311.

11311212012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11311211982 and 11311212000.

It is not an unprimeable number, because it can be changed into a prime (11311212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24805062 + ... + 24805517.

It is an arithmetic number, because the mean of its divisors is an integer number (1157580200).

Almost surely, 2^11311212012 is an apocalyptic number.

11311212012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11311212012 is an abundant number, since it is smaller than the sum of its proper divisors (16470712788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11311212012 is a wasteful number, since it uses less digits than its factorization.

11311212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49610605 (or 49610603 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11311212012 its reverse (21021211311), we get a palindrome (32332423323).

The spelling of 11311212012 in words is "eleven billion, three hundred eleven million, two hundred twelve thousand, twelve".