201111111110001 has 32 divisors (see below), whose sum is σ = 285058999670400. Its totient is φ = 125758565452800.

The previous prime is 201111111109973. The next prime is 201111111110023. The reversal of 201111111110001 is 100011111111102.

It is not a de Polignac number, because 201111111110001 - 2¹⁰ = 201111111108977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201111111110071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861804105 + ... + 862037433.

It is an arithmetic number, because the mean of its divisors is an integer number (8908093739700).

Almost surely, 2^{201111111110001} is an apocalyptic number.

It is an amenable number.

201111111110001 is a deficient number, since it is larger than the sum of its proper divisors (83947888560399).

201111111110001 is a wasteful number, since it uses less digits than its factorization.

201111111110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383169.

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

Adding to 201111111110001 its reverse (100011111111102), we get a palindrome (301122222221103).

The spelling of 201111111110001 in words is "two hundred one trillion, one hundred eleven billion, one hundred eleven million, one hundred ten thousand, one".