201111010101 has 12 divisors (see below), whose sum is σ = 290884664928. Its totient is φ = 133893552744.

The previous prime is 201111010091. The next prime is 201111010117. The reversal of 201111010101 is 101010111102.

It is not a de Polignac number, because 201111010101 - 2¹⁷ = 201110879029 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111010201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15030775 + ... + 15044148.

It is an arithmetic number, because the mean of its divisors is an integer number (24240388744).

Almost surely, 2^201111010101 is an apocalyptic number.

It is an amenable number.

201111010101 is a deficient number, since it is larger than the sum of its proper divisors (89773654827).

201111010101 is a wasteful number, since it uses less digits than its factorization.

201111010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30075672 (or 30075669 counting only the distinct ones).

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

Adding to 201111010101 its reverse (101010111102), we get a palindrome (302121121203).

The spelling of 201111010101 in words is "two hundred one billion, one hundred eleven million, ten thousand, one hundred one".