12321321231 has 8 divisors (see below), whose sum is σ = 16498937520. Its totient is φ = 8178959552.

The previous prime is 12321321223. The next prime is 12321321277. The reversal of 12321321231 is 13212312321.

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

It is a cyclic number.

It is not a de Polignac number, because 12321321231 - 2³ = 12321321223 is a prime.

It is a super-2 number, since 2×12321321231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12321321198 and 12321321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321321281) 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, 8812836 + ... + 8814233.

It is an arithmetic number, because the mean of its divisors is an integer number (2062367190).

Almost surely, 2^12321321231 is an apocalyptic number.

12321321231 is a deficient number, since it is larger than the sum of its proper divisors (4177616289).

12321321231 is a wasteful number, since it uses less digits than its factorization.

12321321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17627305.

The product of its digits is 432, while the sum is 21.

Adding to 12321321231 its reverse (13212312321), we get a palindrome (25533633552).

The spelling of 12321321231 in words is "twelve billion, three hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-one".