12003231231 has 12 divisors (see below), whose sum is σ = 17339773152. Its totient is φ = 8001336096.

The previous prime is 12003231221. The next prime is 12003231239. The reversal of 12003231231 is 13213230021.

12003231231 is a `hidden beast` number, since 1 + 200 + 3 + 231 + 231 = 666.

It is not a de Polignac number, because 12003231231 - 2⁵ = 12003231199 is a prime.

It is a super-2 number, since 2×12003231231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003231239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32595 + ... + 158331.

It is an arithmetic number, because the mean of its divisors is an integer number (1444981096).

Almost surely, 2^12003231231 is an apocalyptic number.

12003231231 is a deficient number, since it is larger than the sum of its proper divisors (5336541921).

12003231231 is a wasteful number, since it uses less digits than its factorization.

12003231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136350 (or 136347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12003231231 its reverse (13213230021), we get a palindrome (25216461252).

The spelling of 12003231231 in words is "twelve billion, three million, two hundred thirty-one thousand, two hundred thirty-one".