211212201220211 has 8 divisors (see below), whose sum is σ = 222329349242880. Its totient is φ = 200095124835528.

The previous prime is 211212201220199. The next prime is 211212201220243. The reversal of 211212201220211 is 112022102212112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211212201220211 is a prime.

It is a super-2 number, since 2×211212201220211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212201520211) 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, 11804291 + ... + 23701596.

It is an arithmetic number, because the mean of its divisors is an integer number (27791168655360).

Almost surely, 2^{211212201220211} is an apocalyptic number.

211212201220211 is a deficient number, since it is larger than the sum of its proper divisors (11117148022669).

211212201220211 is a wasteful number, since it uses less digits than its factorization.

211212201220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35818993.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211212201220211 its reverse (112022102212112), we get a palindrome (323234303432323).

The spelling of 211212201220211 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred one million, two hundred twenty thousand, two hundred eleven".