11533011203221 has 4 divisors (see below), whose sum is σ = 11533241209932. Its totient is φ = 11532781196512.

The previous prime is 11533011203209. The next prime is 11533011203227. The reversal of 11533011203221 is 12230211033511.

11533011203221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3272531652196 + 8260479551025 = 1809014^2 + 2874105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11533011203221 - 2¹⁵ = 11533011170453 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 (11533011203227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114928126 + ... + 115028431.

It is an arithmetic number, because the mean of its divisors is an integer number (2883310302483).

Almost surely, 2^{11533011203221} is an apocalyptic number.

It is an amenable number.

11533011203221 is a deficient number, since it is larger than the sum of its proper divisors (230006711).

11533011203221 is an equidigital number, since it uses as much as digits as its factorization.

11533011203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230006710.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 11533011203221 its reverse (12230211033511), we get a palindrome (23763222236732).

The spelling of 11533011203221 in words is "eleven trillion, five hundred thirty-three billion, eleven million, two hundred three thousand, two hundred twenty-one".