404211000021 has 24 divisors (see below), whose sum is σ = 580908956544. Its totient is φ = 249859399680.

The previous prime is 404211000019. The next prime is 404211000071. The reversal of 404211000021 is 120000112404.

It is not a de Polignac number, because 404211000021 - 2¹ = 404211000019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404211000001) 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, 3919660 + ... + 4021461.

It is an arithmetic number, because the mean of its divisors is an integer number (24204539856).

Almost surely, 2^404211000021 is an apocalyptic number.

It is an amenable number.

404211000021 is a deficient number, since it is larger than the sum of its proper divisors (176697956523).

404211000021 is a wasteful number, since it uses less digits than its factorization.

404211000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7941209 (or 7941190 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 404211000021 its reverse (120000112404), we get a palindrome (524211112425).

The spelling of 404211000021 in words is "four hundred four billion, two hundred eleven million, twenty-one", and thus it is an aban number.