404021442321 has 80 divisors (see below), whose sum is σ = 692612363520. Its totient is φ = 229916257920.

The previous prime is 404021442289. The next prime is 404021442323. The reversal of 404021442321 is 123244120404.

404021442321 is a `hidden beast` number, since 4 + 0 + 4 + 0 + 214 + 423 + 21 = 666.

It is not a de Polignac number, because 404021442321 - 2⁵ = 404021442289 is a prime.

It is a super-2 number, since 2×404021442321² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (404021442323) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 169116195 + ... + 169118583.

It is an arithmetic number, because the mean of its divisors is an integer number (8657654544).

Almost surely, 2^404021442321 is an apocalyptic number.

It is an amenable number.

404021442321 is a deficient number, since it is larger than the sum of its proper divisors (288590921199).

404021442321 is a wasteful number, since it uses less digits than its factorization.

404021442321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516 (or 3507 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 404021442321 its reverse (123244120404), we get a palindrome (527265562725).

The spelling of 404021442321 in words is "four hundred four billion, twenty-one million, four hundred forty-two thousand, three hundred twenty-one".