404253043213221 has 8 divisors (see below), whose sum is σ = 598893397352960. Its totient is φ = 269502028808796.

The previous prime is 404253043213189. The next prime is 404253043213321. The reversal of 404253043213221 is 122312340352404.

404253043213221 is a `hidden beast` number, since 4 + 0 + 4 + 2 + 5 + 3 + 0 + 4 + 321 + 322 + 1 = 666.

It is not a de Polignac number, because 404253043213221 - 2⁵ = 404253043213189 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 (404253043213021) 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, 7486167466885 + ... + 7486167466938.

It is an arithmetic number, because the mean of its divisors is an integer number (74861674669120).

Almost surely, 2^{404253043213221} is an apocalyptic number.

It is an amenable number.

404253043213221 is a deficient number, since it is larger than the sum of its proper divisors (194640354139739).

404253043213221 is a wasteful number, since it uses less digits than its factorization.

404253043213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14972334933832 (or 14972334933826 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 404253043213221 its reverse (122312340352404), we get a palindrome (526565383565625).

The spelling of 404253043213221 in words is "four hundred four trillion, two hundred fifty-three billion, forty-three million, two hundred thirteen thousand, two hundred twenty-one".