12033231231 has 8 divisors (see below), whose sum is σ = 18336352384. Its totient is φ = 6876132120.

The previous prime is 12033231211. The next prime is 12033231269. The reversal of 12033231231 is 13213233021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12033231231 - 2⁶ = 12033231167 is a prime.

It is a super-2 number, since 2×12033231231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 573011011 = 12033231231 / (1 + 2 + 0 + 3 + 3 + 2 + 3 + 1 + 2 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 12033231198 and 12033231207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12033231211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286505485 + ... + 286505526.

It is an arithmetic number, because the mean of its divisors is an integer number (2292044048).

Almost surely, 2^12033231231 is an apocalyptic number.

12033231231 is a deficient number, since it is larger than the sum of its proper divisors (6303121153).

12033231231 is an equidigital number, since it uses as much as digits as its factorization.

12033231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573011021.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12033231231 its reverse (13213233021), we get a palindrome (25246464252).

The spelling of 12033231231 in words is "twelve billion, thirty-three million, two hundred thirty-one thousand, two hundred thirty-one".