331240442120021 has 32 divisors (see below), whose sum is σ = 400960287129600. Its totient is φ = 267131517198336.

The previous prime is 331240442119969. The next prime is 331240442120039. The reversal of 331240442120021 is 120021244042133.

It is not a de Polignac number, because 331240442120021 - 2¹⁰ = 331240442118997 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 (331240442120321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5179727555 + ... + 5179791503.

It is an arithmetic number, because the mean of its divisors is an integer number (12530008972800).

Almost surely, 2^{331240442120021} is an apocalyptic number.

It is an amenable number.

331240442120021 is a deficient number, since it is larger than the sum of its proper divisors (69719845009579).

331240442120021 is a wasteful number, since it uses less digits than its factorization.

331240442120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77573.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 331240442120021 its reverse (120021244042133), we get a palindrome (451261686162154).

The spelling of 331240442120021 in words is "three hundred thirty-one trillion, two hundred forty billion, four hundred forty-two million, one hundred twenty thousand, twenty-one".