12021324123 has 16 divisors (see below), whose sum is σ = 16194283776. Its totient is φ = 7931620320.

The previous prime is 12021324113. The next prime is 12021324137. The reversal of 12021324123 is 32142312021.

It is a de Polignac number, because none of the positive numbers 2^k-12021324123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021324123.

It is not an unprimeable number, because it can be changed into a prime (12021324113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105586 + ... + 187592.

It is an arithmetic number, because the mean of its divisors is an integer number (1012142736).

Almost surely, 2^12021324123 is an apocalyptic number.

12021324123 is a deficient number, since it is larger than the sum of its proper divisors (4172959653).

12021324123 is a wasteful number, since it uses less digits than its factorization.

12021324123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82514.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12021324123 its reverse (32142312021), we get a palindrome (44163636144).

The spelling of 12021324123 in words is "twelve billion, twenty-one million, three hundred twenty-four thousand, one hundred twenty-three".