212221222111 has 8 divisors (see below), whose sum is σ = 221585051520. Its totient is φ = 202868794392.

The previous prime is 212221222093. The next prime is 212221222163. The reversal of 212221222111 is 111222122212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221222111 is a prime.

It is a super-2 number, since 2×212221222111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221222181) 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, 2812365 + ... + 2886838.

It is an arithmetic number, because the mean of its divisors is an integer number (27698131440).

Almost surely, 2^212221222111 is an apocalyptic number.

212221222111 is a deficient number, since it is larger than the sum of its proper divisors (9363829409).

212221222111 is a wasteful number, since it uses less digits than its factorization.

212221222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700845.

The product of its digits is 128, while the sum is 19.

Adding to 212221222111 its reverse (111222122212), we get a palindrome (323443344323).

It can be divided in two parts, 21222122211 and 1, that added together give a palindrome (21222122212).

The spelling of 212221222111 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".