12321220231 has 2 divisors, whose sum is σ = 12321220232. Its totient is φ = 12321220230.

The previous prime is 12321220201. The next prime is 12321220259. The reversal of 12321220231 is 13202212321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12321220231 - 2¹¹ = 12321218183 is a prime.

It is a super-2 number, since 2×12321220231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12321220199 and 12321220208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321220201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160610115 + 6160610116.

It is an arithmetic number, because the mean of its divisors is an integer number (6160610116).

Almost surely, 2^12321220231 is an apocalyptic number.

12321220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321220231 is an equidigital number, since it uses as much as digits as its factorization.

12321220231 is an evil number, because the sum of its binary digits is even.

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

Adding to 12321220231 its reverse (13202212321), we get a palindrome (25523432552).

The spelling of 12321220231 in words is "twelve billion, three hundred twenty-one million, two hundred twenty thousand, two hundred thirty-one".