212404412317 has 2 divisors, whose sum is σ = 212404412318. Its totient is φ = 212404412316.

The previous prime is 212404412309. The next prime is 212404412321. The reversal of 212404412317 is 713214404212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184057302361 + 28347109956 = 429019^2 + 168366^2 .

It is a cyclic number.

It is not a de Polignac number, because 212404412317 - 2³ = 212404412309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212404412387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106202206158 + 106202206159.

It is an arithmetic number, because the mean of its divisors is an integer number (106202206159).

Almost surely, 2^212404412317 is an apocalyptic number.

It is an amenable number.

212404412317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212404412317 is an equidigital number, since it uses as much as digits as its factorization.

212404412317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

Adding to 212404412317 its reverse (713214404212), we get a palindrome (925618816529).

The spelling of 212404412317 in words is "two hundred twelve billion, four hundred four million, four hundred twelve thousand, three hundred seventeen".