1311113012 has 72 divisors (see below), whose sum is σ = 2661452640. Its totient is φ = 560387520.

The previous prime is 1311112967. The next prime is 1311113029. The reversal of 1311113012 is 2103111131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3128939 + ... + 3129357.

It is an arithmetic number, because the mean of its divisors is an integer number (36964620).

Almost surely, 2^1311113012 is an apocalyptic number.

It is an amenable number.

1311113012 is an abundant number, since it is smaller than the sum of its proper divisors (1350339628).

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

1311113012 is a wasteful number, since it uses less digits than its factorization.

1311113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1311113012 is about 36209.2945526421. The cubic root of 1311113012 is about 1094.4939766265.

Adding to 1311113012 its reverse (2103111131), we get a palindrome (3414224143).

The spelling of 1311113012 in words is "one billion, three hundred eleven million, one hundred thirteen thousand, twelve".