21201010211 has 8 divisors (see below), whose sum is σ = 21288550560. Its totient is φ = 21113549568.

The previous prime is 21201010189. The next prime is 21201010213. The reversal of 21201010211 is 11201010212.

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 21201010211 - 2¹⁰ = 21201009187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201010192 and 21201010201.

It is not an unprimeable number, because it can be changed into a prime (21201010213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546035 + ... + 583571.

It is an arithmetic number, because the mean of its divisors is an integer number (2661068820).

Almost surely, 2^21201010211 is an apocalyptic number.

21201010211 is a deficient number, since it is larger than the sum of its proper divisors (87540349).

21201010211 is a wasteful number, since it uses less digits than its factorization.

21201010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39853.

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

Adding to 21201010211 its reverse (11201010212), we get a palindrome (32402020423).

Subtracting from 21201010211 its reverse (11201010212), we obtain a palindrome (9999999999).

The spelling of 21201010211 in words is "twenty-one billion, two hundred one million, ten thousand, two hundred eleven".