20001111200201 has 16 divisors (see below), whose sum is σ = 21220035659280. Its totient is φ = 18786927943680.

The previous prime is 20001111200183. The next prime is 20001111200237. The reversal of 20001111200201 is 10200211110002.

It can be written as a sum of positive squares in 8 ways, for example, as 635170744576 + 19365940455625 = 796976^2 + 4400675^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001111200201 - 2⁶ = 20001111200137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001111220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19965011 + ... + 20942871.

It is an arithmetic number, because the mean of its divisors is an integer number (1326252228705).

Almost surely, 2^{20001111200201} is an apocalyptic number.

It is an amenable number.

20001111200201 is a deficient number, since it is larger than the sum of its proper divisors (1218924459079).

20001111200201 is a wasteful number, since it uses less digits than its factorization.

20001111200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980284.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001111200201 its reverse (10200211110002), we get a palindrome (30201322310203).

The spelling of 20001111200201 in words is "twenty trillion, one billion, one hundred eleven million, two hundred thousand, two hundred one".