217012266301969 has 2 divisors, whose sum is σ = 217012266301970. Its totient is φ = 217012266301968.

The previous prime is 217012266301967. The next prime is 217012266302003. The reversal of 217012266301969 is 969103662210712.

217012266301969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139932646051969 + 77079620250000 = 11829313^2 + 8779500^2 .

It is a cyclic number.

It is not a de Polignac number, because 217012266301969 - 2¹ = 217012266301967 is a prime.

It is a super-2 number, since 2×217012266301969² (a number of 29 digits) contains 22 as substring.

Together with 217012266301967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (217012266301967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108506133150984 + 108506133150985.

It is an arithmetic number, because the mean of its divisors is an integer number (108506133150985).

Almost surely, 2^{217012266301969} is an apocalyptic number.

It is an amenable number.

217012266301969 is a deficient number, since it is larger than the sum of its proper divisors (1).

217012266301969 is an equidigital number, since it uses as much as digits as its factorization.

217012266301969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 217012266301969 in words is "two hundred seventeen trillion, twelve billion, two hundred sixty-six million, three hundred one thousand, nine hundred sixty-nine".