11311321312 has 48 divisors (see below), whose sum is σ = 22803137280. Its totient is φ = 5520235392.

The previous prime is 11311321309. The next prime is 11311321337. The reversal of 11311321312 is 21312311311.

It is a self number, because there is not a number n which added to its sum of digits gives 11311321312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3381913 + ... + 3385255.

It is an arithmetic number, because the mean of its divisors is an integer number (475065360).

Almost surely, 2^11311321312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11311321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11401568640).

11311321312 is an abundant number, since it is smaller than the sum of its proper divisors (11491815968).

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

11311321312 is a wasteful number, since it uses less digits than its factorization.

11311321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855 (or 5847 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

Adding to 11311321312 its reverse (21312311311), we get a palindrome (32623632623).

The spelling of 11311321312 in words is "eleven billion, three hundred eleven million, three hundred twenty-one thousand, three hundred twelve".