211210212111 has 8 divisors (see below), whose sum is σ = 281658434304. Its totient is φ = 140784399000.

The previous prime is 211210212097. The next prime is 211210212167. The reversal of 211210212111 is 111212012112.

It is a happy number.

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

It is not a de Polignac number, because 211210212111 - 2⁵ = 211210212079 is a prime.

It is a super-2 number, since 2×211210212111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5580265 + ... + 5617986.

It is an arithmetic number, because the mean of its divisors is an integer number (35207304288).

Almost surely, 2^211210212111 is an apocalyptic number.

211210212111 is a deficient number, since it is larger than the sum of its proper divisors (70448222193).

211210212111 is a wasteful number, since it uses less digits than its factorization.

211210212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11204541.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211210212111 its reverse (111212012112), we get a palindrome (322422224223).

The spelling of 211210212111 in words is "two hundred eleven billion, two hundred ten million, two hundred twelve thousand, one hundred eleven".