11321032221 has 12 divisors (see below), whose sum is σ = 16357708380. Its totient is φ = 7544998080.

The previous prime is 11321032187. The next prime is 11321032231. The reversal of 11321032221 is 12223012311.

11321032221 is a `hidden beast` number, since 1 + 1 + 321 + 0 + 322 + 21 = 666.

11321032221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7459776900 + 3861255321 = 86370^2 + 62139^2 .

It is not a de Polignac number, because 11321032221 - 2¹¹ = 11321030173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11321032194 and 11321032203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321032231) 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 11 ways as a sum of consecutive naturals, for example, 165720 + ... + 223841.

It is an arithmetic number, because the mean of its divisors is an integer number (1363142365).

Almost surely, 2^11321032221 is an apocalyptic number.

It is an amenable number.

11321032221 is a deficient number, since it is larger than the sum of its proper divisors (5036676159).

11321032221 is a wasteful number, since it uses less digits than its factorization.

11321032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392796 (or 392793 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11321032221 its reverse (12223012311), we get a palindrome (23544044532).

The spelling of 11321032221 in words is "eleven billion, three hundred twenty-one million, thirty-two thousand, two hundred twenty-one".