201020101111 has 4 divisors (see below), whose sum is σ = 201972803224. Its totient is φ = 200067399000.

The previous prime is 201020101109. The next prime is 201020101123. The reversal of 201020101111 is 111101020102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201020101111 - 2¹ = 201020101109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020101151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476350740 + ... + 476351161.

It is an arithmetic number, because the mean of its divisors is an integer number (50493200806).

Almost surely, 2^201020101111 is an apocalyptic number.

201020101111 is a deficient number, since it is larger than the sum of its proper divisors (952702113).

201020101111 is an equidigital number, since it uses as much as digits as its factorization.

201020101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952702112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 201020101111 its reverse (111101020102), we get a palindrome (312121121213).

The spelling of 201020101111 in words is "two hundred one billion, twenty million, one hundred one thousand, one hundred eleven".