2212123211 has 4 divisors (see below), whose sum is σ = 2229541632. Its totient is φ = 2194704792.

The previous prime is 2212123201. The next prime is 2212123217. The reversal of 2212123211 is 1123212122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212123211 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 2212123211.

It is not an unprimeable number, because it can be changed into a prime (2212123217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8709020 + ... + 8709273.

It is an arithmetic number, because the mean of its divisors is an integer number (557385408).

Almost surely, 2^2212123211 is an apocalyptic number.

2212123211 is a deficient number, since it is larger than the sum of its proper divisors (17418421).

2212123211 is a wasteful number, since it uses less digits than its factorization.

2212123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17418420.

The product of its digits is 96, while the sum is 17.

The square root of 2212123211 is about 47033.2139131487. The cubic root of 2212123211 is about 1302.9760636130.

Adding to 2212123211 its reverse (1123212122), we get a palindrome (3335335333).

The spelling of 2212123211 in words is "two billion, two hundred twelve million, one hundred twenty-three thousand, two hundred eleven".