42404051052221 has 16 divisors (see below), whose sum is σ = 42518421504000. Its totient is φ = 42289874082288.

The previous prime is 42404051052211. The next prime is 42404051052227. The reversal of 42404051052221 is 12225015040424.

It is a cyclic number.

It is not a de Polignac number, because 42404051052221 - 2¹⁸ = 42404050790077 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 (42404051052227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1812204680 + ... + 1812228078.

It is an arithmetic number, because the mean of its divisors is an integer number (2657401344000).

Almost surely, 2^{42404051052221} is an apocalyptic number.

It is an amenable number.

42404051052221 is a deficient number, since it is larger than the sum of its proper divisors (114370451779).

42404051052221 is a wasteful number, since it uses less digits than its factorization.

42404051052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27328.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 42404051052221 its reverse (12225015040424), we get a palindrome (54629066092645).

The spelling of 42404051052221 in words is "forty-two trillion, four hundred four billion, fifty-one million, fifty-two thousand, two hundred twenty-one".