12321026523 has 12 divisors (see below), whose sum is σ = 19166041440. Its totient is φ = 7582170096.

The previous prime is 12321026513. The next prime is 12321026527. The reversal of 12321026523 is 32562012321.

It is a happy number.

12321026523 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 1 + 0 + 2 + 652 + 3 = 666.

It is not a de Polignac number, because 12321026523 - 2¹⁷ = 12320895451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12321026527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52653843 + ... + 52654076.

It is an arithmetic number, because the mean of its divisors is an integer number (1597170120).

Almost surely, 2^12321026523 is an apocalyptic number.

12321026523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12321026523 is a deficient number, since it is larger than the sum of its proper divisors (6845014917).

12321026523 is a wasteful number, since it uses less digits than its factorization.

12321026523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105307938 (or 105307935 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 12321026523 its reverse (32562012321), we get a palindrome (44883038844).

The spelling of 12321026523 in words is "twelve billion, three hundred twenty-one million, twenty-six thousand, five hundred twenty-three".