11311321000 has 128 divisors (see below), whose sum is σ = 30298095360. Its totient is φ = 3871968000.

The previous prime is 11311320989. The next prime is 11311321001. The reversal of 11311321000 is 12311311.

It is not an unprimeable number, because it can be changed into a prime (11311321001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7426239 + ... + 7427761.

It is an arithmetic number, because the mean of its divisors is an integer number (236703870).

Almost surely, 2^11311321000 is an apocalyptic number.

11311321000 is a gapful number since it is divisible by the number (10) 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 11311321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15149047680).

11311321000 is an abundant number, since it is smaller than the sum of its proper divisors (18986774360).

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

11311321000 is a wasteful number, since it uses less digits than its factorization.

11311321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612 (or 2598 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 11311321000 its reverse (12311311), we get a palindrome (11323632311).

The spelling of 11311321000 in words is "eleven billion, three hundred eleven million, three hundred twenty-one thousand".