11211221304 has 48 divisors (see below), whose sum is σ = 30567537000. Its totient is φ = 3711989184.

The previous prime is 11211221299. The next prime is 11211221323. The reversal of 11211221304 is 40312211211.

11211221304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511794 + ... + 533249.

Almost surely, 2^11211221304 is an apocalyptic number.

It is an amenable number.

11211221304 is an abundant number, since it is smaller than the sum of its proper divisors (19356315696).

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

11211221304 is a wasteful number, since it uses less digits than its factorization.

11211221304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045204 (or 1045197 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11211221304 its reverse (40312211211), we get a palindrome (51523432515).

The spelling of 11211221304 in words is "eleven billion, two hundred eleven million, two hundred twenty-one thousand, three hundred four".