221200212212221 has 8 divisors (see below), whose sum is σ = 244708045265088. Its totient is φ = 198258832968000.

The previous prime is 221200212212209. The next prime is 221200212212279. The reversal of 221200212212221 is 122212212002122.

221200212212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221200212212221 - 2²¹ = 221200210115069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200212212192 and 221200212212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200212210221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141613451340 + ... + 141613452901.

It is an arithmetic number, because the mean of its divisors is an integer number (30588505658136).

Almost surely, 2^{221200212212221} is an apocalyptic number.

It is an amenable number.

221200212212221 is a deficient number, since it is larger than the sum of its proper divisors (23507833052867).

221200212212221 is a wasteful number, since it uses less digits than its factorization.

221200212212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283226904323.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221200212212221 its reverse (122212212002122), we get a palindrome (343412424214343).

The spelling of 221200212212221 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".