12231021523 has 32 divisors (see below), whose sum is σ = 14719491072. Its totient is φ = 9945936000.

The previous prime is 12231021499. The next prime is 12231021533. The reversal of 12231021523 is 32512013221.

12231021523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12231021523 - 2²¹ = 12228924371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12231021494 and 12231021503.

It is not an unprimeable number, because it can be changed into a prime (12231021533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1607458 + ... + 1615048.

It is an arithmetic number, because the mean of its divisors is an integer number (459984096).

Almost surely, 2^12231021523 is an apocalyptic number.

12231021523 is a deficient number, since it is larger than the sum of its proper divisors (2488469549).

12231021523 is a wasteful number, since it uses less digits than its factorization.

12231021523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 12231021523 its reverse (32512013221), we get a palindrome (44743034744).

The spelling of 12231021523 in words is "twelve billion, two hundred thirty-one million, twenty-one thousand, five hundred twenty-three".