217317792122 has 4 divisors (see below), whose sum is σ = 325976688186. Its totient is φ = 108658896060.

The previous prime is 217317792119. The next prime is 217317792137. The reversal of 217317792122 is 221297713712.

217317792122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 164220268081 + 53097524041 = 405241^2 + 230429^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54329448029 + ... + 54329448032.

Almost surely, 2^217317792122 is an apocalyptic number.

217317792122 is a deficient number, since it is larger than the sum of its proper divisors (108658896064).

217317792122 is a wasteful number, since it uses less digits than its factorization.

217317792122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108658896063.

The product of its digits is 148176, while the sum is 44.

The spelling of 217317792122 in words is "two hundred seventeen billion, three hundred seventeen million, seven hundred ninety-two thousand, one hundred twenty-two".