12001231203021 has 6 divisors (see below), whose sum is σ = 17335111737710. Its totient is φ = 8000820802008.

The previous prime is 12001231202867. The next prime is 12001231203041. The reversal of 12001231203021 is 12030213210021.

12001231203021 is a `hidden beast` number, since 120 + 0 + 123 + 120 + 302 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6955430409225 + 5045800793796 = 2637315^2 + 2246286^2 .

It is not a de Polignac number, because 12001231203021 - 2⁹ = 12001231202509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001231202985 and 12001231203003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001231203041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666735066826 + ... + 666735066843.

Almost surely, 2^{12001231203021} is an apocalyptic number.

It is an amenable number.

12001231203021 is a deficient number, since it is larger than the sum of its proper divisors (5333880534689).

12001231203021 is a wasteful number, since it uses less digits than its factorization.

12001231203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333470133675 (or 1333470133672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12001231203021 its reverse (12030213210021), we get a palindrome (24031444413042).

The spelling of 12001231203021 in words is "twelve trillion, one billion, two hundred thirty-one million, two hundred three thousand, twenty-one".