12131003300021 has 4 divisors (see below), whose sum is σ = 12844591729452. Its totient is φ = 11417414870592.

The previous prime is 12131003300011. The next prime is 12131003300033. The reversal of 12131003300021 is 12000330013121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7152575824900 + 4978427475121 = 2674430^2 + 2231239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131003300021 - 2¹⁸ = 12131003037877 is a prime.

It is a super-2 number, since 2×12131003300021² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 713588429413 = 12131003300021 / (1 + 2 + 1 + 3 + 1 + 0 + 0 + 3 + 3 + 0 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131003300011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356794214690 + ... + 356794214723.

It is an arithmetic number, because the mean of its divisors is an integer number (3211147932363).

Almost surely, 2^{12131003300021} is an apocalyptic number.

It is an amenable number.

12131003300021 is a deficient number, since it is larger than the sum of its proper divisors (713588429431).

12131003300021 is an equidigital number, since it uses as much as digits as its factorization.

12131003300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713588429430.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12131003300021 its reverse (12000330013121), we get a palindrome (24131333313142).

The spelling of 12131003300021 in words is "twelve trillion, one hundred thirty-one billion, three million, three hundred thousand, twenty-one".