331212251242 has 32 divisors (see below), whose sum is σ = 522250831872. Its totient is φ = 157341248064.

The previous prime is 331212251207. The next prime is 331212251261. The reversal of 331212251242 is 242152212133.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 331212251242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14285143 + ... + 14308309.

It is an arithmetic number, because the mean of its divisors is an integer number (16320338496).

Almost surely, 2^331212251242 is an apocalyptic number.

331212251242 is a deficient number, since it is larger than the sum of its proper divisors (191038580630).

331212251242 is a wasteful number, since it uses less digits than its factorization.

331212251242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27742.

The product of its digits is 5760, while the sum is 28.

Adding to 331212251242 its reverse (242152212133), we get a palindrome (573364463375).

The spelling of 331212251242 in words is "three hundred thirty-one billion, two hundred twelve million, two hundred fifty-one thousand, two hundred forty-two".