331442134021 has 4 divisors (see below), whose sum is σ = 333177433344. Its totient is φ = 329706834700.

The previous prime is 331442133961. The next prime is 331442134039. The reversal of 331442134021 is 120431244133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120431244133 = 31 ⋅3884878843.

It is a cyclic number.

It is not a de Polignac number, because 331442134021 - 2¹⁷ = 331442002949 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 (331442134081) 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, 867649375 + ... + 867649756.

It is an arithmetic number, because the mean of its divisors is an integer number (83294358336).

Almost surely, 2^331442134021 is an apocalyptic number.

It is an amenable number.

331442134021 is a deficient number, since it is larger than the sum of its proper divisors (1735299323).

331442134021 is a wasteful number, since it uses less digits than its factorization.

331442134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735299322.

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

Adding to 331442134021 its reverse (120431244133), we get a palindrome (451873378154).

The spelling of 331442134021 in words is "three hundred thirty-one billion, four hundred forty-two million, one hundred thirty-four thousand, twenty-one".