212101102101221 has 16 divisors (see below), whose sum is σ = 222504156828480. Its totient is φ = 202027018596480.

The previous prime is 212101102101157. The next prime is 212101102101253. The reversal of 212101102101221 is 122101201101212.

212101102101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212101102101221 - 2⁶ = 212101102101157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212101102101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101102107221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439559936 + ... + 440042201.

It is an arithmetic number, because the mean of its divisors is an integer number (13906509801780).

Almost surely, 2^{212101102101221} is an apocalyptic number.

It is an amenable number.

212101102101221 is a deficient number, since it is larger than the sum of its proper divisors (10403054727259).

212101102101221 is an equidigital number, since it uses as much as digits as its factorization.

212101102101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879602324.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212101102101221 its reverse (122101201101212), we get a palindrome (334202303202433).

The spelling of 212101102101221 in words is "two hundred twelve trillion, one hundred one billion, one hundred two million, one hundred one thousand, two hundred twenty-one".