11312121304 has 64 divisors (see below), whose sum is σ = 23669107200. Its totient is φ = 5024304000.

The previous prime is 11312121299. The next prime is 11312121313. The reversal of 11312121304 is 40312121311.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3054654 + ... + 3058354.

It is an arithmetic number, because the mean of its divisors is an integer number (369829800).

Almost surely, 2^11312121304 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 11312121304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11834553600).

11312121304 is an abundant number, since it is smaller than the sum of its proper divisors (12356985896).

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

11312121304 is a wasteful number, since it uses less digits than its factorization.

11312121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504 (or 4500 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11312121304 its reverse (40312121311), we get a palindrome (51624242615).

The spelling of 11312121304 in words is "eleven billion, three hundred twelve million, one hundred twenty-one thousand, three hundred four".