11532321021 has 16 divisors (see below), whose sum is σ = 16590921536. Its totient is φ = 7083230976.

The previous prime is 11532321001. The next prime is 11532321077. The reversal of 11532321021 is 12012323511.

It is not a de Polignac number, because 11532321021 - 2⁷ = 11532320893 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 (11532321001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262300 + ... + 303093.

It is an arithmetic number, because the mean of its divisors is an integer number (1036932596).

Almost surely, 2^11532321021 is an apocalyptic number.

It is an amenable number.

11532321021 is a deficient number, since it is larger than the sum of its proper divisors (5058600515).

11532321021 is a wasteful number, since it uses less digits than its factorization.

11532321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565932.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 11532321021 its reverse (12012323511), we get a palindrome (23544644532).

The spelling of 11532321021 in words is "eleven billion, five hundred thirty-two million, three hundred twenty-one thousand, twenty-one".