211101222111 has 16 divisors (see below), whose sum is σ = 303919512960. Its totient is φ = 129565668960.

The previous prime is 211101222109. The next prime is 211101222113. The reversal of 211101222111 is 111222101112.

It is a happy number.

211101222111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211101222109) and next prime (211101222113).

It is not a de Polignac number, because 211101222111 - 2¹ = 211101222109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101222113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7126185 + ... + 7155746.

It is an arithmetic number, because the mean of its divisors is an integer number (18994969560).

Almost surely, 2^211101222111 is an apocalyptic number.

211101222111 is a deficient number, since it is larger than the sum of its proper divisors (92818290849).

211101222111 is a wasteful number, since it uses less digits than its factorization.

211101222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14282326.

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

Adding to 211101222111 its reverse (111222101112), we get a palindrome (322323323223).

The spelling of 211101222111 in words is "two hundred eleven billion, one hundred one million, two hundred twenty-two thousand, one hundred eleven".