2212112321 has 4 divisors (see below), whose sum is σ = 2214989700. Its totient is φ = 2209234944.

The previous prime is 2212112299. The next prime is 2212112323. The reversal of 2212112321 is 1232112122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 421891600 + 1790220721 = 20540^2 + 42311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212112321 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 2212112321.

It is not an unprimeable number, because it can be changed into a prime (2212112323) 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, 1437536 + ... + 1439073.

It is an arithmetic number, because the mean of its divisors is an integer number (553747425).

Almost surely, 2^2212112321 is an apocalyptic number.

It is an amenable number.

2212112321 is a deficient number, since it is larger than the sum of its proper divisors (2877379).

2212112321 is an equidigital number, since it uses as much as digits as its factorization.

2212112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877378.

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

The square root of 2212112321 is about 47033.0981437540. The cubic root of 2212112321 is about 1302.9739254813.

Adding to 2212112321 its reverse (1232112122), we get a palindrome (3444224443).

The spelling of 2212112321 in words is "two billion, two hundred twelve million, one hundred twelve thousand, three hundred twenty-one".