11321115312 has 120 divisors (see below), whose sum is σ = 31967400384. Its totient is φ = 3450600192.

The previous prime is 11321115307. The next prime is 11321115317. The reversal of 11321115312 is 21351112311.

It is an interprime number because it is at equal distance from previous prime (11321115307) and next prime (11321115317).

It is not an unprimeable number, because it can be changed into a prime (11321115317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 861463 + ... + 874505.

Almost surely, 2^11321115312 is an apocalyptic number.

11321115312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11321115312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15983700192).

11321115312 is an abundant number, since it is smaller than the sum of its proper divisors (20646285072).

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

11321115312 is a wasteful number, since it uses less digits than its factorization.

11321115312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13187 (or 13168 counting only the distinct ones).

The product of its digits is 180, while the sum is 21.

Adding to 11321115312 its reverse (21351112311), we get a palindrome (32672227623).

The spelling of 11321115312 in words is "eleven billion, three hundred twenty-one million, one hundred fifteen thousand, three hundred twelve".