12443211231 has 8 divisors (see below), whose sum is σ = 18099216384. Its totient is φ = 7541340120.

The previous prime is 12443211223. The next prime is 12443211269. The reversal of 12443211231 is 13211234421.

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

It is not a de Polignac number, because 12443211231 - 2³ = 12443211223 is a prime.

It is a super-2 number, since 2×12443211231² (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 (12443211631) 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, 188533471 + ... + 188533536.

It is an arithmetic number, because the mean of its divisors is an integer number (2262402048).

Almost surely, 2^12443211231 is an apocalyptic number.

12443211231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12443211231 is a deficient number, since it is larger than the sum of its proper divisors (5656005153).

12443211231 is a wasteful number, since it uses less digits than its factorization.

12443211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377067021.

The product of its digits is 1152, while the sum is 24.

Adding to 12443211231 its reverse (13211234421), we get a palindrome (25654445652).

The spelling of 12443211231 in words is "twelve billion, four hundred forty-three million, two hundred eleven thousand, two hundred thirty-one".