321025042331 has 4 divisors (see below), whose sum is σ = 366885762672. Its totient is φ = 275164321992.

The previous prime is 321025042309. The next prime is 321025042333. The reversal of 321025042331 is 133240520123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133240520123 = 7069 ⋅18848567.

It is not a de Polignac number, because 321025042331 - 2⁶ = 321025042267 is a prime.

It is a super-2 number, since 2×321025042331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321025042331.

It is not an unprimeable number, because it can be changed into a prime (321025042333) 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, 22930360160 + ... + 22930360173.

It is an arithmetic number, because the mean of its divisors is an integer number (91721440668).

Almost surely, 2^321025042331 is an apocalyptic number.

321025042331 is a deficient number, since it is larger than the sum of its proper divisors (45860720341).

321025042331 is an equidigital number, since it uses as much as digits as its factorization.

321025042331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45860720340.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 321025042331 its reverse (133240520123), we get a palindrome (454265562454).

The spelling of 321025042331 in words is "three hundred twenty-one billion, twenty-five million, forty-two thousand, three hundred thirty-one".