404223212405421 has 48 divisors (see below), whose sum is σ = 619072609559040. Its totient is φ = 253711984164480.

The previous prime is 404223212405417. The next prime is 404223212405461. The reversal of 404223212405421 is 124504212322404.

404223212405421 is a `hidden beast` number, since 4 + 0 + 4 + 2 + 232 + 12 + 405 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 404223212405421 - 2² = 404223212405417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404223212405461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88818471 + ... + 93258603.

It is an arithmetic number, because the mean of its divisors is an integer number (12897346032480).

Almost surely, 2^{404223212405421} is an apocalyptic number.

It is an amenable number.

404223212405421 is a deficient number, since it is larger than the sum of its proper divisors (214849397153619).

404223212405421 is a wasteful number, since it uses less digits than its factorization.

404223212405421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449026 (or 4449023 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 404223212405421 its reverse (124504212322404), we get a palindrome (528727424727825).

The spelling of 404223212405421 in words is "four hundred four trillion, two hundred twenty-three billion, two hundred twelve million, four hundred five thousand, four hundred twenty-one".