211212102221 has 8 divisors (see below), whose sum is σ = 212006729088. Its totient is φ = 210417588000.

The previous prime is 211212102193. The next prime is 211212102223. The reversal of 211212102221 is 122201212112.

211212102221 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 211212102221 - 2¹⁴ = 211212085837 is a prime.

It is a super-2 number, since 2×211212102221² (a number of 23 digits) contains 22 as substring.

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 211212102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212102223) 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, 6911786 + ... + 6942276.

It is an arithmetic number, because the mean of its divisors is an integer number (26500841136).

Almost surely, 2^211212102221 is an apocalyptic number.

It is an amenable number.

211212102221 is a deficient number, since it is larger than the sum of its proper divisors (794626867).

211212102221 is a wasteful number, since it uses less digits than its factorization.

211212102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56323.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212102221 its reverse (122201212112), we get a palindrome (333413314333).

The spelling of 211212102221 in words is "two hundred eleven billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".