212211122111 has 8 divisors (see below), whose sum is σ = 224698153680. Its totient is φ = 199724537728.

The previous prime is 212211122069. The next prime is 212211122177. The reversal of 212211122111 is 111221112212.

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 212211122111 - 2¹⁴ = 212211105727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 212211122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211122611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780085 + ... + 1895553.

It is an arithmetic number, because the mean of its divisors is an integer number (28087269210).

Almost surely, 2^212211122111 is an apocalyptic number.

212211122111 is a deficient number, since it is larger than the sum of its proper divisors (12487031569).

212211122111 is a wasteful number, since it uses less digits than its factorization.

212211122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223593.

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

Adding to 212211122111 its reverse (111221112212), we get a palindrome (323432234323).

It can be divided in two parts, 21221112211 and 1, that added together give a palindrome (21221112212).

The spelling of 212211122111 in words is "two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, one hundred eleven".