217429220099 has 16 divisors (see below), whose sum is σ = 267789531072. Its totient is φ = 171913408128.

The previous prime is 217429220039. The next prime is 217429220101. The reversal of 217429220099 is 990022924712.

It is not a de Polignac number, because 217429220099 - 2²⁴ = 217412442883 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (217429220009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689984 + ... + 954429.

It is an arithmetic number, because the mean of its divisors is an integer number (16736845692).

Almost surely, 2^217429220099 is an apocalyptic number.

217429220099 is a deficient number, since it is larger than the sum of its proper divisors (50360310973).

217429220099 is a wasteful number, since it uses less digits than its factorization.

217429220099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645886.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 217429220099 in words is "two hundred seventeen billion, four hundred twenty-nine million, two hundred twenty thousand, ninety-nine".