404122221 has 24 divisors (see below), whose sum is σ = 605011680. Its totient is φ = 259629216.

The previous prime is 404122219. The next prime is 404122247. The reversal of 404122221 is 122221404.

It is not a de Polignac number, because 404122221 - 2¹ = 404122219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 404122194 and 404122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404122261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177130 + ... + 179396.

It is an arithmetic number, because the mean of its divisors is an integer number (25208820).

Almost surely, 2^404122221 is an apocalyptic number.

It is an amenable number.

404122221 is a deficient number, since it is larger than the sum of its proper divisors (200889459).

404122221 is a wasteful number, since it uses less digits than its factorization.

404122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 404122221 is about 20102.7913733392. The cubic root of 404122221 is about 739.3287198275.

Adding to 404122221 its reverse (122221404), we get a palindrome (526343625).

It can be divided in two parts, 4041 and 22221, that added together give a palindrome (26262).

The spelling of 404122221 in words is "four hundred four million, one hundred twenty-two thousand, two hundred twenty-one".