221000212021201 has 16 divisors (see below), whose sum is σ = 245149656359040. Its totient is φ = 198282810211200.

The previous prime is 221000212021187. The next prime is 221000212021217. The reversal of 221000212021201 is 102120212000122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221000212021201 - 2⁷ = 221000212021073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221000212021231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2503526700 + ... + 2503614973.

It is an arithmetic number, because the mean of its divisors is an integer number (15321853522440).

Almost surely, 2^{221000212021201} is an apocalyptic number.

It is an amenable number.

221000212021201 is a deficient number, since it is larger than the sum of its proper divisors (24149444337839).

221000212021201 is a wasteful number, since it uses less digits than its factorization.

221000212021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5007141816.

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

Adding to 221000212021201 its reverse (102120212000122), we get a palindrome (323120424021323).

The spelling of 221000212021201 in words is "two hundred twenty-one trillion, two hundred twelve million, twenty-one thousand, two hundred one".