42043313221 has 64 divisors (see below), whose sum is σ = 55248793600. Its totient is φ = 31066177536.

The previous prime is 42043313219. The next prime is 42043313237. The reversal of 42043313221 is 12231334024.

It is a cyclic number.

It is not a de Polignac number, because 42043313221 - 2¹ = 42043313219 is a prime.

It is a super-2 number, since 2×42043313221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42043313321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54672325 + ... + 54673093.

It is an arithmetic number, because the mean of its divisors is an integer number (863262400).

Almost surely, 2^42043313221 is an apocalyptic number.

It is an amenable number.

42043313221 is a deficient number, since it is larger than the sum of its proper divisors (13205480379).

42043313221 is a wasteful number, since it uses less digits than its factorization.

42043313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 42043313221 its reverse (12231334024), we get a palindrome (54274647245).

The spelling of 42043313221 in words is "forty-two billion, forty-three million, three hundred thirteen thousand, two hundred twenty-one".