331140042430021 has 4 divisors (see below), whose sum is σ = 361243682650944. Its totient is φ = 301036402209100.

The previous prime is 331140042430009. The next prime is 331140042430039. The reversal of 331140042430021 is 120034240041133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331140042430021 - 2⁹ = 331140042429509 is a prime.

It is a super-2 number, since 2×331140042430021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331140042430051) 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 3 ways as a sum of consecutive naturals, for example, 15051820110445 + ... + 15051820110466.

It is an arithmetic number, because the mean of its divisors is an integer number (90310920662736).

Almost surely, 2^{331140042430021} is an apocalyptic number.

It is an amenable number.

331140042430021 is a deficient number, since it is larger than the sum of its proper divisors (30103640220923).

331140042430021 is a wasteful number, since it uses less digits than its factorization.

331140042430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30103640220922.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 331140042430021 its reverse (120034240041133), we get a palindrome (451174282471154).

The spelling of 331140042430021 in words is "three hundred thirty-one trillion, one hundred forty billion, forty-two million, four hundred thirty thousand, twenty-one".