21202201211211 has 12 divisors (see below), whose sum is σ = 31203239519088. Its totient is φ = 13868106452304.

The previous prime is 21202201211173. The next prime is 21202201211263. The reversal of 21202201211211 is 11211210220212.

21202201211211 is a `hidden beast` number, since 2 + 1 + 20 + 220 + 1 + 211 + 211 = 666.

It is not a de Polignac number, because 21202201211211 - 2¹⁰ = 21202201210187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202201221211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22224529095 + ... + 22224530048.

It is an arithmetic number, because the mean of its divisors is an integer number (2600269959924).

Almost surely, 2^{21202201211211} is an apocalyptic number.

21202201211211 is a deficient number, since it is larger than the sum of its proper divisors (10001038307877).

21202201211211 is a wasteful number, since it uses less digits than its factorization.

21202201211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44449059202 (or 44449059199 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21202201211211 its reverse (11211210220212), we get a palindrome (32413411431423).

Subtracting from 21202201211211 its reverse (11211210220212), we obtain a palindrome (9990990990999).

The spelling of 21202201211211 in words is "twenty-one trillion, two hundred two billion, two hundred one million, two hundred eleven thousand, two hundred eleven".