11523333221 has 8 divisors (see below), whose sum is σ = 11634183360. Its totient is φ = 11412541728.

The previous prime is 11523333209. The next prime is 11523333223. The reversal of 11523333221 is 12233332511.

11523333221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11523333221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523333223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 450545 + ... + 475433.

It is an arithmetic number, because the mean of its divisors is an integer number (1454272920).

Almost surely, 2^11523333221 is an apocalyptic number.

It is an amenable number.

11523333221 is a deficient number, since it is larger than the sum of its proper divisors (110850139).

11523333221 is a wasteful number, since it uses less digits than its factorization.

11523333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29323.

The product of its digits is 3240, while the sum is 26.

Adding to 11523333221 its reverse (12233332511), we get a palindrome (23756665732).

The spelling of 11523333221 in words is "eleven billion, five hundred twenty-three million, three hundred thirty-three thousand, two hundred twenty-one".