21210001000211 has 16 divisors (see below), whose sum is σ = 21524506157568. Its totient is φ = 20896149960000.

The previous prime is 21210001000103. The next prime is 21210001000229. The reversal of 21210001000211 is 11200010001212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210001000211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210001000192 and 21210001000201.

It is not an unprimeable number, because it can be changed into a prime (21210001000511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563971970 + ... + 564009576.

It is an arithmetic number, because the mean of its divisors is an integer number (1345281634848).

Almost surely, 2^{21210001000211} is an apocalyptic number.

21210001000211 is a deficient number, since it is larger than the sum of its proper divisors (314505157357).

21210001000211 is a wasteful number, since it uses less digits than its factorization.

21210001000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46082.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210001000211 its reverse (11200010001212), we get a palindrome (32410011001423).

The spelling of 21210001000211 in words is "twenty-one trillion, two hundred ten billion, one million, two hundred eleven", and thus it is an aban number.