404213322421 has 4 divisors (see below), whose sum is σ = 410246357152. Its totient is φ = 398180287692.

The previous prime is 404213322419. The next prime is 404213322431. The reversal of 404213322421 is 124223312404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404213322421 - 2¹ = 404213322419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404213322421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404213322431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3016517265 + ... + 3016517398.

It is an arithmetic number, because the mean of its divisors is an integer number (102561589288).

Almost surely, 2^404213322421 is an apocalyptic number.

It is an amenable number.

404213322421 is a deficient number, since it is larger than the sum of its proper divisors (6033034731).

404213322421 is an equidigital number, since it uses as much as digits as its factorization.

404213322421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6033034730.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 404213322421 its reverse (124223312404), we get a palindrome (528436634825).

The spelling of 404213322421 in words is "four hundred four billion, two hundred thirteen million, three hundred twenty-two thousand, four hundred twenty-one".