12032131221 has 36 divisors (see below), whose sum is σ = 19130485920. Its totient is φ = 7281846000.

The previous prime is 12032131207. The next prime is 12032131253. The reversal of 12032131221 is 12213123021.

12032131221 is a `hidden beast` number, since 12 + 0 + 321 + 312 + 21 = 666.

It is not a de Polignac number, because 12032131221 - 2⁷ = 12032131093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12032131194 and 12032131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12032131421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 797296 + ... + 812246.

Almost surely, 2^12032131221 is an apocalyptic number.

12032131221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12032131221 is a deficient number, since it is larger than the sum of its proper divisors (7098354699).

12032131221 is a wasteful number, since it uses less digits than its factorization.

12032131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15718 (or 15704 counting only the distinct ones).

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

Adding to 12032131221 its reverse (12213123021), we get a palindrome (24245254242).

The spelling of 12032131221 in words is "twelve billion, thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".