404240442221 has 48 divisors (see below), whose sum is σ = 529011181440. Its totient is φ = 302099635200.

The previous prime is 404240442211. The next prime is 404240442227. The reversal of 404240442221 is 122244042404.

It is a happy number.

It is not a de Polignac number, because 404240442221 - 2⁶ = 404240442157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404240442227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1950245 + ... + 2147541.

It is an arithmetic number, because the mean of its divisors is an integer number (11021066280).

Almost surely, 2^404240442221 is an apocalyptic number.

404240442221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

404240442221 is a deficient number, since it is larger than the sum of its proper divisors (124770739219).

404240442221 is a wasteful number, since it uses less digits than its factorization.

404240442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197426 (or 197415 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 404240442221 its reverse (122244042404), we get a palindrome (526484484625).

The spelling of 404240442221 in words is "four hundred four billion, two hundred forty million, four hundred forty-two thousand, two hundred twenty-one".