201111111212011 has 192 divisors, whose sum is σ = 278570413965312. Its totient is φ = 140945313600000.

The previous prime is 201111111211981. The next prime is 201111111212047. The reversal of 201111111212011 is 110212111111102.

It is not a de Polignac number, because 201111111212011 - 2¹⁷ = 201111111080939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201111111212111) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 60375594616 + ... + 60375597946.

It is an arithmetic number, because the mean of its divisors is an integer number (1450887572736).

Almost surely, 2^{201111111212011} is an apocalyptic number.

201111111212011 is a deficient number, since it is larger than the sum of its proper divisors (77459302753301).

201111111212011 is a wasteful number, since it uses less digits than its factorization.

201111111212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194 (or 4181 counting only the distinct ones).

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

Adding to 201111111212011 its reverse (110212111111102), we get a palindrome (311323222323113).

The spelling of 201111111212011 in words is "two hundred one trillion, one hundred eleven billion, one hundred eleven million, two hundred twelve thousand, eleven".