212221201101221 has 8 divisors (see below), whose sum is σ = 228744471803904. Its totient is φ = 195726296530800.

The previous prime is 212221201101181. The next prime is 212221201101233. The reversal of 212221201101221 is 122101102122212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221201101221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212221201101193 and 212221201101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221201101421) 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, 7091517521 + ... + 7091547446.

It is an arithmetic number, because the mean of its divisors is an integer number (28593058975488).

Almost surely, 2^{212221201101221} is an apocalyptic number.

It is an amenable number.

212221201101221 is a deficient number, since it is larger than the sum of its proper divisors (16523270702683).

212221201101221 is a wasteful number, since it uses less digits than its factorization.

212221201101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14183066131.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212221201101221 its reverse (122101102122212), we get a palindrome (334322303223433).

The spelling of 212221201101221 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred one million, one hundred one thousand, two hundred twenty-one".