20011000111001 has 8 divisors (see below), whose sum is σ = 20883092405760. Its totient is φ = 19139078550592.

The previous prime is 20011000110947. The next prime is 20011000111009. The reversal of 20011000111001 is 10011100011002.

It is a happy number.

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 20011000111001 - 2¹⁰ = 20011000109977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20011000111001.

It is not an unprimeable number, because it can be changed into a prime (20011000111009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42444041 + ... + 42912918.

It is an arithmetic number, because the mean of its divisors is an integer number (2610386550720).

Almost surely, 2^{20011000111001} is an apocalyptic number.

It is an amenable number.

20011000111001 is a deficient number, since it is larger than the sum of its proper divisors (872092294759).

20011000111001 is a wasteful number, since it uses less digits than its factorization.

20011000111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85367175.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20011000111001 its reverse (10011100011002), we get a palindrome (30022100122003).

Subtracting from 20011000111001 its reverse (10011100011002), we obtain a palindrome (9999900099999).

It can be divided in two parts, 200110001 and 11001, that added together give a palindrome (200121002).

The spelling of 20011000111001 in words is "twenty trillion, eleven billion, one hundred eleven thousand, one".