21001000211 has 8 divisors (see below), whose sum is σ = 21424135824. Its totient is φ = 20578860640.

The previous prime is 21001000199. The next prime is 21001000213. The reversal of 21001000211 is 11200010012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21001000211 - 2⁶ = 21001000147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001000213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206345 + ... + 290826.

It is an arithmetic number, because the mean of its divisors is an integer number (2678016978).

Almost surely, 2^21001000211 is an apocalyptic number.

21001000211 is a deficient number, since it is larger than the sum of its proper divisors (423135613).

21001000211 is an equidigital number, since it uses as much as digits as its factorization.

21001000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498021.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21001000211 its reverse (11200010012), we get a palindrome (32201010223).

The spelling of 21001000211 in words is "twenty-one billion, one million, two hundred eleven", and thus it is an aban number.