211213210211 has 4 divisors (see below), whose sum is σ = 223637516712. Its totient is φ = 198788903712.

The previous prime is 211213210207. The next prime is 211213210267. The reversal of 211213210211 is 112012312112.

It is a happy number.

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 211213210211 - 2² = 211213210207 is a prime.

It is a super-2 number, since 2×211213210211² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 12424306483 = 211213210211 / (2 + 1 + 1 + 2 + 1 + 3 + 2 + 1 + 0 + 2 + 1 + 1).

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 211213210211.

It is not an unprimeable number, because it can be changed into a prime (211213210511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6212153225 + ... + 6212153258.

It is an arithmetic number, because the mean of its divisors is an integer number (55909379178).

Almost surely, 2^211213210211 is an apocalyptic number.

211213210211 is a deficient number, since it is larger than the sum of its proper divisors (12424306501).

211213210211 is a wasteful number, since it uses less digits than its factorization.

211213210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12424306500.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211213210211 its reverse (112012312112), we get a palindrome (323225522323).

The spelling of 211213210211 in words is "two hundred eleven billion, two hundred thirteen million, two hundred ten thousand, two hundred eleven".