212221012220221 has 8 divisors (see below), whose sum is σ = 223645260450080. Its totient is φ = 200822236117488.

The previous prime is 212221012220209. The next prime is 212221012220263. The reversal of 212221012220221 is 122022210122212.

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 212221012220221 - 2¹³ = 212221012212029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212221012220192 and 212221012220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221012223221) 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 7 ways as a sum of consecutive naturals, for example, 6368014671 + ... + 6368047996.

It is an arithmetic number, because the mean of its divisors is an integer number (27955657556260).

Almost surely, 2^{212221012220221} is an apocalyptic number.

It is an amenable number.

212221012220221 is a deficient number, since it is larger than the sum of its proper divisors (11424248229859).

212221012220221 is a wasteful number, since it uses less digits than its factorization.

212221012220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12736063563.

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

Adding to 212221012220221 its reverse (122022210122212), we get a palindrome (334243222342433).

The spelling of 212221012220221 in words is "two hundred twelve trillion, two hundred twenty-one billion, twelve million, two hundred twenty thousand, two hundred twenty-one".