212100121021201 has 4 divisors (see below), whose sum is σ = 242400138309952. Its totient is φ = 181800103732452.

The previous prime is 212100121021199. The next prime is 212100121021219. The reversal of 212100121021201 is 102120121001212.

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 212100121021201 - 2¹ = 212100121021199 is a prime.

It is a super-2 number, since 2×212100121021201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212160121021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15150008644365 + ... + 15150008644378.

It is an arithmetic number, because the mean of its divisors is an integer number (60600034577488).

Almost surely, 2^{212100121021201} is an apocalyptic number.

It is an amenable number.

212100121021201 is a deficient number, since it is larger than the sum of its proper divisors (30300017288751).

212100121021201 is an equidigital number, since it uses as much as digits as its factorization.

212100121021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30300017288750.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212100121021201 its reverse (102120121001212), we get a palindrome (314220242022413).

The spelling of 212100121021201 in words is "two hundred twelve trillion, one hundred billion, one hundred twenty-one million, twenty-one thousand, two hundred one".