21404210001 has 4 divisors (see below), whose sum is σ = 28538946672. Its totient is φ = 14269473332.

The previous prime is 21404209999. The next prime is 21404210083. The reversal of 21404210001 is 10001240412.

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 21404210001 - 2¹ = 21404209999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21404211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3567368331 + ... + 3567368336.

It is an arithmetic number, because the mean of its divisors is an integer number (7134736668).

Almost surely, 2^21404210001 is an apocalyptic number.

It is an amenable number.

21404210001 is a deficient number, since it is larger than the sum of its proper divisors (7134736671).

21404210001 is an equidigital number, since it uses as much as digits as its factorization.

21404210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134736670.

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

Adding to 21404210001 its reverse (10001240412), we get a palindrome (31405450413).

The spelling of 21404210001 in words is "twenty-one billion, four hundred four million, two hundred ten thousand, one".