201020011111 has 8 divisors (see below), whose sum is σ = 205308089280. Its totient is φ = 196732393728.

The previous prime is 201020011099. The next prime is 201020011117. The reversal of 201020011111 is 111110020102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201020011111 - 2¹³ = 201020002919 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 (201020011117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852355 + ... + 1062331.

It is an arithmetic number, because the mean of its divisors is an integer number (25663511160).

Almost surely, 2^201020011111 is an apocalyptic number.

201020011111 is a deficient number, since it is larger than the sum of its proper divisors (4288078169).

201020011111 is a wasteful number, since it uses less digits than its factorization.

201020011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230393.

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

Adding to 201020011111 its reverse (111110020102), we get a palindrome (312130031213).

The spelling of 201020011111 in words is "two hundred one billion, twenty million, eleven thousand, one hundred eleven".