21200121110201 has 8 divisors (see below), whose sum is σ = 23318540426208. Its totient is φ = 19272837371700.

The previous prime is 21200121110149. The next prime is 21200121110227. The reversal of 21200121110201 is 10201112100212.

It is a de Polignac number, because none of the positive numbers 2^k-21200121110201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200121110291) 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 7 ways as a sum of consecutive naturals, for example, 7963981055 + ... + 7963983716.

It is an arithmetic number, because the mean of its divisors is an integer number (2914817553276).

Almost surely, 2^{21200121110201} is an apocalyptic number.

It is an amenable number.

21200121110201 is a deficient number, since it is larger than the sum of its proper divisors (2118419316007).

21200121110201 is an equidigital number, since it uses as much as digits as its factorization.

21200121110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15927964804 (or 15927964782 counting only the distinct ones).

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

Adding to 21200121110201 its reverse (10201112100212), we get a palindrome (31401233210413).

The spelling of 21200121110201 in words is "twenty-one trillion, two hundred billion, one hundred twenty-one million, one hundred ten thousand, two hundred one".