212242242217 has 2 divisors, whose sum is σ = 212242242218. Its totient is φ = 212242242216.

The previous prime is 212242242187. The next prime is 212242242221. The reversal of 212242242217 is 712242242212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140280960681 + 71961281536 = 374541^2 + 268256^2 .

It is a cyclic number.

It is not a de Polignac number, because 212242242217 - 2²³ = 212233853609 is a prime.

It is not a weakly prime, because it can be changed into another prime (212242242917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121121108 + 106121121109.

It is an arithmetic number, because the mean of its divisors is an integer number (106121121109).

Almost surely, 2^212242242217 is an apocalyptic number.

It is an amenable number.

212242242217 is a deficient number, since it is larger than the sum of its proper divisors (1).

212242242217 is an equidigital number, since it uses as much as digits as its factorization.

212242242217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 31.

Adding to 212242242217 its reverse (712242242212), we get a palindrome (924484484429).

The spelling of 212242242217 in words is "two hundred twelve billion, two hundred forty-two million, two hundred forty-two thousand, two hundred seventeen".