211222110111 has 16 divisors (see below), whose sum is σ = 281906632800. Its totient is φ = 140676236288.

The previous prime is 211222110107. The next prime is 211222110137. The reversal of 211222110111 is 111011222112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211222110111 - 2² = 211222110107 is a prime.

It is a super-2 number, since 2×211222110111² (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 (211222110311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15830635 + ... + 15843971.

It is an arithmetic number, because the mean of its divisors is an integer number (17619164550).

Almost surely, 2^211222110111 is an apocalyptic number.

211222110111 is a deficient number, since it is larger than the sum of its proper divisors (70684522689).

211222110111 is a wasteful number, since it uses less digits than its factorization.

211222110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18138.

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

Adding to 211222110111 its reverse (111011222112), we get a palindrome (322233332223).

The spelling of 211222110111 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred ten thousand, one hundred eleven".