11311312012 has 48 divisors (see below), whose sum is σ = 26577637632. Its totient is φ = 4068002880.

The previous prime is 11311311941. The next prime is 11311312037. The reversal of 11311312012 is 21021311311.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408498 + ... + 1416505.

It is an arithmetic number, because the mean of its divisors is an integer number (553700784).

Almost surely, 2^11311312012 is an apocalyptic number.

It is an amenable number.

11311312012 is an abundant number, since it is smaller than the sum of its proper divisors (15266325620).

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

11311312012 is a wasteful number, since it uses less digits than its factorization.

11311312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825038 (or 2825036 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11311312012 its reverse (21021311311), we get a palindrome (32332623323).

It can be divided in two parts, 11311 and 312012, that added together give a palindrome (323323).

The spelling of 11311312012 in words is "eleven billion, three hundred eleven million, three hundred twelve thousand, twelve".