212201021222221 has 8 divisors (see below), whose sum is σ = 214302773228544. Its totient is φ = 210099283957200.

The previous prime is 212201021222219. The next prime is 212201021222227. The reversal of 212201021222221 is 122222120102212.

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 212201021222221 - 2¹ = 212201021222219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201021222192 and 212201021222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201021222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26462560 + ... + 33536086.

It is an arithmetic number, because the mean of its divisors is an integer number (26787846653568).

Almost surely, 2^{212201021222221} is an apocalyptic number.

It is an amenable number.

212201021222221 is a deficient number, since it is larger than the sum of its proper divisors (2101752006323).

212201021222221 is a wasteful number, since it uses less digits than its factorization.

212201021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370651.

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

Adding to 212201021222221 its reverse (122222120102212), we get a palindrome (334423141324433).

The spelling of 212201021222221 in words is "two hundred twelve trillion, two hundred one billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".