21101122210211 has 8 divisors (see below), whose sum is σ = 21193458315120. Its totient is φ = 21008801262592.

The previous prime is 21101122210163. The next prime is 21101122210297. The reversal of 21101122210211 is 11201222110112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21101122210211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21101122210211.

It is not an unprimeable number, because it can be changed into a prime (21101122210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 994445 + ... + 6571998.

It is an arithmetic number, because the mean of its divisors is an integer number (2649182289390).

Almost surely, 2^{21101122210211} is an apocalyptic number.

21101122210211 is a deficient number, since it is larger than the sum of its proper divisors (92336104909).

21101122210211 is a wasteful number, since it uses less digits than its factorization.

21101122210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578645.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21101122210211 its reverse (11201222110112), we get a palindrome (32302344320323).

The spelling of 21101122210211 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, two hundred ten thousand, two hundred eleven".