20111102210201 has 4 divisors (see below), whose sum is σ = 20189355526452. Its totient is φ = 20032848893952.

The previous prime is 20111102210191. The next prime is 20111102210261. The reversal of 20111102210201 is 10201220111102.

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 14281407855625 + 5829694354576 = 3779075^2 + 2414476^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111102210201 - 2¹⁸ = 20111101948057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111102210261) 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, 39126657740 + ... + 39126658253.

It is an arithmetic number, because the mean of its divisors is an integer number (5047338881613).

Almost surely, 2^{20111102210201} is an apocalyptic number.

It is an amenable number.

20111102210201 is a deficient number, since it is larger than the sum of its proper divisors (78253316251).

20111102210201 is an equidigital number, since it uses as much as digits as its factorization.

20111102210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78253316250.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20111102210201 its reverse (10201220111102), we get a palindrome (30312322321303).

The spelling of 20111102210201 in words is "twenty trillion, one hundred eleven billion, one hundred two million, two hundred ten thousand, two hundred one".