21200120212201 has 4 divisors (see below), whose sum is σ = 24228708813952. Its totient is φ = 18171531610452.

The previous prime is 21200120212157. The next prime is 21200120212223. The reversal of 21200120212201 is 10221202100212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21200120212201 - 2²⁵ = 21200086657769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200120212001) 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 3 ways as a sum of consecutive naturals, for example, 1514294300865 + ... + 1514294300878.

It is an arithmetic number, because the mean of its divisors is an integer number (6057177203488).

Almost surely, 2^{21200120212201} is an apocalyptic number.

It is an amenable number.

21200120212201 is a deficient number, since it is larger than the sum of its proper divisors (3028588601751).

21200120212201 is an equidigital number, since it uses as much as digits as its factorization.

21200120212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028588601750.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21200120212201 its reverse (10221202100212), we get a palindrome (31421322312413).

The spelling of 21200120212201 in words is "twenty-one trillion, two hundred billion, one hundred twenty million, two hundred twelve thousand, two hundred one".