21200121200201 has 32 divisors (see below), whose sum is σ = 23061925497600. Its totient is φ = 19413702092800.

The previous prime is 21200121200173. The next prime is 21200121200249. The reversal of 21200121200201 is 10200212100212.

It is a cyclic number.

It is not a de Polignac number, because 21200121200201 - 2¹⁰ = 21200121199177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21200121200261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294046565 + ... + 294118653.

It is an arithmetic number, because the mean of its divisors is an integer number (720685171800).

Almost surely, 2^{21200121200201} is an apocalyptic number.

It is an amenable number.

21200121200201 is a deficient number, since it is larger than the sum of its proper divisors (1861804297399).

21200121200201 is a wasteful number, since it uses less digits than its factorization.

21200121200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75169.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200121200201 its reverse (10200212100212), we get a palindrome (31400333300413).

The spelling of 21200121200201 in words is "twenty-one trillion, two hundred billion, one hundred twenty-one million, two hundred thousand, two hundred one".