211222112111 has 16 divisors (see below), whose sum is σ = 222746630400. Its totient is φ = 199738712448.

The previous prime is 211222112083. The next prime is 211222112137. The reversal of 211222112111 is 111211222112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222112111 is a prime.

It is a super-2 number, since 2×211222112111² (a number of 23 digits) contains 22 as substring.

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 211222112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211227112111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27939350 + ... + 27946908.

It is an arithmetic number, because the mean of its divisors is an integer number (13921664400).

Almost surely, 2^211222112111 is an apocalyptic number.

211222112111 is a deficient number, since it is larger than the sum of its proper divisors (11524518289).

211222112111 is a wasteful number, since it uses less digits than its factorization.

211222112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10078.

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

Adding to 211222112111 its reverse (111211222112), we get a palindrome (322433334223).

It can be divided in two parts, 211222112 and 111, that multiplied together give a palindrome (23445654432).

The spelling of 211222112111 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred eleven".