21230323132221 has 48 divisors (see below), whose sum is σ = 35528034320896. Its totient is φ = 11965070608128.

The previous prime is 21230323132141. The next prime is 21230323132273. The reversal of 21230323132221 is 12223132303212.

21230323132221 is a `hidden beast` number, since 2 + 1 + 2 + 303 + 2 + 3 + 132 + 221 = 666.

It is not a de Polignac number, because 21230323132221 - 2⁷ = 21230323132093 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 (21230323142221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 269199831 + ... + 269278683.

Almost surely, 2^{21230323132221} is an apocalyptic number.

21230323132221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21230323132221 is a deficient number, since it is larger than the sum of its proper divisors (14297711188675).

21230323132221 is a wasteful number, since it uses less digits than its factorization.

21230323132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137482 (or 137479 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21230323132221 its reverse (12223132303212), we get a palindrome (33453455435433).

The spelling of 21230323132221 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty-three million, one hundred thirty-two thousand, two hundred twenty-one".