12123342231 has 48 divisors (see below), whose sum is σ = 21867804672. Its totient is φ = 5813375040.

The previous prime is 12123342227. The next prime is 12123342289. The reversal of 12123342231 is 13224332121.

It is not a de Polignac number, because 12123342231 - 2² = 12123342227 is a prime.

It is a super-2 number, since 2×12123342231² (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 (12123342221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150471 + ... + 216536.

It is an arithmetic number, because the mean of its divisors is an integer number (455579264).

Almost surely, 2^12123342231 is an apocalyptic number.

12123342231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12123342231 is a deficient number, since it is larger than the sum of its proper divisors (9744462441).

12123342231 is a wasteful number, since it uses less digits than its factorization.

12123342231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367052 (or 367041 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 12123342231 its reverse (13224332121), we get a palindrome (25347674352).

The spelling of 12123342231 in words is "twelve billion, one hundred twenty-three million, three hundred forty-two thousand, two hundred thirty-one".