201111100101 has 16 divisors (see below), whose sum is σ = 298585893120. Its totient is φ = 133784481600.

The previous prime is 201111100081. The next prime is 201111100129. The reversal of 201111100101 is 101001111102.

It is not a de Polignac number, because 201111100101 - 2¹⁸ = 201110837957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111100181) 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, 8031300 + ... + 8056301.

It is an arithmetic number, because the mean of its divisors is an integer number (18661618320).

Almost surely, 2^201111100101 is an apocalyptic number.

It is an amenable number.

201111100101 is a deficient number, since it is larger than the sum of its proper divisors (97474793019).

201111100101 is a wasteful number, since it uses less digits than its factorization.

201111100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16088073 (or 16088067 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 201111100101 its reverse (101001111102), we get a palindrome (302112211203).

The spelling of 201111100101 in words is "two hundred one billion, one hundred eleven million, one hundred thousand, one hundred one".