211212110222221 has 8 divisors (see below), whose sum is σ = 211292248096800. Its totient is φ = 211131973747248.

The previous prime is 211212110222203. The next prime is 211212110222231. The reversal of 211212110222221 is 122222011212112.

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 211212110222221 - 2¹¹ = 211212110220173 is a prime.

It is a super-2 number, since 2×211212110222221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211212110222192 and 211212110222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212110222231) 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, 379274035 + ... + 379830511.

It is an arithmetic number, because the mean of its divisors is an integer number (26411531012100).

Almost surely, 2^{211212110222221} is an apocalyptic number.

It is an amenable number.

211212110222221 is a deficient number, since it is larger than the sum of its proper divisors (80137874579).

211212110222221 is a wasteful number, since it uses less digits than its factorization.

211212110222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699803.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211212110222221 its reverse (122222011212112), we get a palindrome (333434121434333).

The spelling of 211212110222221 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".