201000111001 has 4 divisors (see below), whose sum is σ = 201026328100. Its totient is φ = 200973893904.

The previous prime is 201000110999. The next prime is 201000111017. The reversal of 201000111001 is 100111000102.

201000111001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 151184102976 + 49816008025 = 388824^2 + 223195^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000111001 - 2¹ = 201000110999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201000111061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13097046 + ... + 13112383.

It is an arithmetic number, because the mean of its divisors is an integer number (50256582025).

Almost surely, 2^201000111001 is an apocalyptic number.

It is an amenable number.

201000111001 is a deficient number, since it is larger than the sum of its proper divisors (26217099).

201000111001 is an equidigital number, since it uses as much as digits as its factorization.

201000111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26217098.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 201000111001 its reverse (100111000102), we get a palindrome (301111111103).

The spelling of 201000111001 in words is "two hundred one billion, one hundred eleven thousand, one".