42004113140221 has 8 divisors (see below), whose sum is σ = 42168931536888. Its totient is φ = 41839593600000.

The previous prime is 42004113140201. The next prime is 42004113140237. The reversal of 42004113140221 is 12204131140024.

It can be written as a sum of positive squares in 4 ways, for example, as 32888091614596 + 9116021525625 = 5734814^2 + 3019275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42004113140221 - 2⁴¹ = 39805089884669 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 (42004113140201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74432460 + ... + 74994661.

It is an arithmetic number, because the mean of its divisors is an integer number (5271116442111).

Almost surely, 2^{42004113140221} is an apocalyptic number.

It is an amenable number.

42004113140221 is a deficient number, since it is larger than the sum of its proper divisors (164818396667).

42004113140221 is a wasteful number, since it uses less digits than its factorization.

42004113140221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149428223.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 42004113140221 its reverse (12204131140024), we get a palindrome (54208244280245).

The spelling of 42004113140221 in words is "forty-two trillion, four billion, one hundred thirteen million, one hundred forty thousand, two hundred twenty-one".