331221240344442 has 32 divisors (see below), whose sum is σ = 774683565460992. Its totient is φ = 92433834514224.

The previous prime is 331221240344441. The next prime is 331221240344473. The reversal of 331221240344442 is 244443042122133.

It is a super-2 number, since 2×331221240344442² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331221240344442.

It is not an unprimeable number, because it can be changed into a prime (331221240344441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91700230848 + ... + 91700234459.

It is an arithmetic number, because the mean of its divisors is an integer number (24208861420656).

Almost surely, 2^{331221240344442} is an apocalyptic number.

331221240344442 is an abundant number, since it is smaller than the sum of its proper divisors (443462325116550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331221240344442 is a wasteful number, since it uses less digits than its factorization.

331221240344442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183400465362.

The product of its (nonzero) digits is 442368, while the sum is 39.

Adding to 331221240344442 its reverse (244443042122133), we get a palindrome (575664282466575).

The spelling of 331221240344442 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred forty million, three hundred forty-four thousand, four hundred forty-two".