211111102012111 has 8 divisors (see below), whose sum is σ = 241284615598080. Its totient is φ = 180941284607928.

The previous prime is 211111102012091. The next prime is 211111102012121. The reversal of 211111102012111 is 111210201111112.

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

It is a cyclic number.

It is not a de Polignac number, because 211111102012111 - 2⁵ = 211111102012079 is a prime.

It is a super-3 number, since 3×211111102012111³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111102012121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923923051 + ... + 924151516.

It is an arithmetic number, because the mean of its divisors is an integer number (30160576949760).

Almost surely, 2^{211111102012111} is an apocalyptic number.

211111102012111 is a deficient number, since it is larger than the sum of its proper divisors (30173513585969).

211111102012111 is a wasteful number, since it uses less digits than its factorization.

211111102012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848090893.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 211111102012111 its reverse (111210201111112), we get a palindrome (322321303123223).

Subtracting from 211111102012111 its reverse (111210201111112), we obtain a palindrome (99900900900999).

The spelling of 211111102012111 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred two million, twelve thousand, one hundred eleven".