2212123217 has 2 divisors, whose sum is σ = 2212123218. Its totient is φ = 2212123216.

The previous prime is 2212123201. The next prime is 2212123229. The reversal of 2212123217 is 7123212122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1319069761 + 893053456 = 36319^2 + 29884^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212123217 - 2⁴ = 2212123201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212123192 and 2212123201.

It is not a weakly prime, because it can be changed into another prime (2212123237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106061608 + 1106061609.

It is an arithmetic number, because the mean of its divisors is an integer number (1106061609).

Almost surely, 2^2212123217 is an apocalyptic number.

It is an amenable number.

2212123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212123217 is an equidigital number, since it uses as much as digits as its factorization.

2212123217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 2212123217 is about 47033.2139769334. The cubic root of 2212123217 is about 1302.9760647911.

Adding to 2212123217 its reverse (7123212122), we get a palindrome (9335335339).

The spelling of 2212123217 in words is "two billion, two hundred twelve million, one hundred twenty-three thousand, two hundred seventeen".