201111010101111 has 16 divisors (see below), whose sum is σ = 295811904545280. Its totient is φ = 120515961107520.

The previous prime is 201111010101107. The next prime is 201111010101139. The reversal of 201111010101111 is 111101010111102.

It is not a de Polignac number, because 201111010101111 - 2² = 201111010101107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111010101151) 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, 34237486015 + ... + 34237491888.

It is an arithmetic number, because the mean of its divisors is an integer number (18488244034080).

Almost surely, 2^{201111010101111} is an apocalyptic number.

201111010101111 is a deficient number, since it is larger than the sum of its proper divisors (94700894444169).

201111010101111 is a wasteful number, since it uses less digits than its factorization.

201111010101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68474978006.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 201111010101111 its reverse (111101010111102), we get a palindrome (312212020212213).

Subtracting from 201111010101111 its reverse (111101010111102), we obtain a palindrome (90009999990009).

The spelling of 201111010101111 in words is "two hundred one trillion, one hundred eleven billion, ten million, one hundred one thousand, one hundred eleven".