211121201011211 has 4 divisors (see below), whose sum is σ = 211136547481392. Its totient is φ = 211105854541032.

The previous prime is 211121201011183. The next prime is 211121201011297. The reversal of 211121201011211 is 112110102121112.

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

It is a cyclic number.

It is not a de Polignac number, because 211121201011211 - 2³⁸ = 210846323104267 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 211121201011211.

It is not an unprimeable number, because it can be changed into a prime (211121201013211) 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, 7673214455 + ... + 7673241968.

It is an arithmetic number, because the mean of its divisors is an integer number (52784136870348).

Almost surely, 2^{211121201011211} is an apocalyptic number.

211121201011211 is a deficient number, since it is larger than the sum of its proper divisors (15346470181).

211121201011211 is a wasteful number, since it uses less digits than its factorization.

211121201011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15346470180.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 211121201011211 its reverse (112110102121112), we get a palindrome (323231303132323).

The spelling of 211121201011211 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred one million, eleven thousand, two hundred eleven".