212031222320257 has 2 divisors, whose sum is σ = 212031222320258. Its totient is φ = 212031222320256.

The previous prime is 212031222320189. The next prime is 212031222320279. The reversal of 212031222320257 is 752023222130212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207975364665201 + 4055857655056 = 14421351^2 + 2013916^2 .

It is a cyclic number.

It is not a de Polignac number, because 212031222320257 - 2¹⁹ = 212031221795969 is a prime.

It is not a weakly prime, because it can be changed into another prime (212031222321257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015611160128 + 106015611160129.

It is an arithmetic number, because the mean of its divisors is an integer number (106015611160129).

Almost surely, 2^{212031222320257} is an apocalyptic number.

It is an amenable number.

212031222320257 is a deficient number, since it is larger than the sum of its proper divisors (1).

212031222320257 is an equidigital number, since it uses as much as digits as its factorization.

212031222320257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 212031222320257 its reverse (752023222130212), we get a palindrome (964054444450469).

The spelling of 212031222320257 in words is "two hundred twelve trillion, thirty-one billion, two hundred twenty-two million, three hundred twenty thousand, two hundred fifty-seven".