21200010201211 has 4 divisors (see below), whose sum is σ = 21468364760800. Its totient is φ = 20931655641624.

The previous prime is 21200010201187. The next prime is 21200010201289. The reversal of 21200010201211 is 11210201000212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200010201211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200010201191 and 21200010201200.

It is not an unprimeable number, because it can be changed into a prime (21200010201511) 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, 134177279676 + ... + 134177279833.

It is an arithmetic number, because the mean of its divisors is an integer number (5367091190200).

Almost surely, 2^{21200010201211} is an apocalyptic number.

21200010201211 is a deficient number, since it is larger than the sum of its proper divisors (268354559589).

21200010201211 is an equidigital number, since it uses as much as digits as its factorization.

21200010201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268354559588.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200010201211 its reverse (11210201000212), we get a palindrome (32410211201423).

The spelling of 21200010201211 in words is "twenty-one trillion, two hundred billion, ten million, two hundred one thousand, two hundred eleven".