331012103020021 has 4 divisors (see below), whose sum is σ = 336438530938444. Its totient is φ = 325585675101600.

The previous prime is 331012103019919. The next prime is 331012103020087. The reversal of 331012103020021 is 120020301210133.

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 12350831640625 + 318661271379396 = 3514375^2 + 17851086^2 .

It is a cyclic number.

It is not a de Polignac number, because 331012103020021 - 2⁹ = 331012103019509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331012103020121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2713213959120 + ... + 2713213959241.

It is an arithmetic number, because the mean of its divisors is an integer number (84109632734611).

Almost surely, 2^{331012103020021} is an apocalyptic number.

It is an amenable number.

331012103020021 is a deficient number, since it is larger than the sum of its proper divisors (5426427918423).

331012103020021 is an equidigital number, since it uses as much as digits as its factorization.

331012103020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426427918422.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 331012103020021 its reverse (120020301210133), we get a palindrome (451032404230154).

The spelling of 331012103020021 in words is "three hundred thirty-one trillion, twelve billion, one hundred three million, twenty thousand, twenty-one".