202117001 has 4 divisors (see below), whose sum is σ = 202193172. Its totient is φ = 202040832.

The previous prime is 202116991. The next prime is 202117007. The reversal of 202117001 is 100711202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100711202 = 2 ⋅50355601.

It can be written as a sum of positive squares in 2 ways, for example, as 176916601 + 25200400 = 13301^2 + 5020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202117001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202117007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33956 + ... + 39461.

It is an arithmetic number, because the mean of its divisors is an integer number (50548293).

Almost surely, 2^202117001 is an apocalyptic number.

It is an amenable number.

202117001 is a deficient number, since it is larger than the sum of its proper divisors (76171).

202117001 is an equidigital number, since it uses as much as digits as its factorization.

202117001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76170.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 202117001 is about 14216.7858885192. The cubic root of 202117001 is about 586.8596926745.

Adding to 202117001 its reverse (100711202), we get a palindrome (302828203).

The spelling of 202117001 in words is "two hundred two million, one hundred seventeen thousand, one".