12021232231 has 4 divisors (see below), whose sum is σ = 12022392712. Its totient is φ = 12020071752.

The previous prime is 12021232229. The next prime is 12021232261. The reversal of 12021232231 is 13223212021.

12021232231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021232231 - 2¹ = 12021232229 is a prime.

It is a super-2 number, since 2×12021232231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021232199 and 12021232208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021232211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564561 + ... + 585466.

It is an arithmetic number, because the mean of its divisors is an integer number (3005598178).

Almost surely, 2^12021232231 is an apocalyptic number.

12021232231 is a deficient number, since it is larger than the sum of its proper divisors (1160481).

12021232231 is a wasteful number, since it uses less digits than its factorization.

12021232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160480.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12021232231 its reverse (13223212021), we get a palindrome (25244444252).

The spelling of 12021232231 in words is "twelve billion, twenty-one million, two hundred thirty-two thousand, two hundred thirty-one".