217906933122 has 54 divisors (see below), whose sum is σ = 482596924329. Its totient is φ = 71059837680.

The previous prime is 217906933103. The next prime is 217906933187. The reversal of 217906933122 is 221339609712.

217906933122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212715586521 + 5191346601 = 461211^2 + 72051^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=330081.

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 in 26 ways as a sum of consecutive naturals, for example, 93081672 + ... + 93084012.

Almost surely, 2^217906933122 is an apocalyptic number.

217906933122 is an abundant number, since it is smaller than the sum of its proper divisors (264689991207).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217906933122 is an frugal number, since it uses more digits than its factorization.

217906933122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 217906933122 in words is "two hundred seventeen billion, nine hundred six million, nine hundred thirty-three thousand, one hundred twenty-two".