217201221702 has 12 divisors (see below), whose sum is σ = 470602647060. Its totient is φ = 72400407228.

The previous prime is 217201221641. The next prime is 217201221703. The reversal of 217201221702 is 207122102712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217201221703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6033367252 + ... + 6033367287.

It is an arithmetic number, because the mean of its divisors is an integer number (39216887255).

Almost surely, 2^217201221702 is an apocalyptic number.

217201221702 is an abundant number, since it is smaller than the sum of its proper divisors (253401425358).

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

217201221702 is a wasteful number, since it uses less digits than its factorization.

217201221702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12066734547 (or 12066734544 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The spelling of 217201221702 in words is "two hundred seventeen billion, two hundred one million, two hundred twenty-one thousand, seven hundred two".