102020217 has 8 divisors (see below), whose sum is σ = 146490624. Its totient is φ = 62781648.

The previous prime is 102020189. The next prime is 102020227. The reversal of 102020217 is 712020201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102020217 - 2⁶ = 102020153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020196 and 102020205.

It is not an unprimeable number, because it can be changed into a prime (102020227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1307913 + ... + 1307990.

It is an arithmetic number, because the mean of its divisors is an integer number (18311328).

Almost surely, 2^102020217 is an apocalyptic number.

It is an amenable number.

102020217 is a deficient number, since it is larger than the sum of its proper divisors (44470407).

102020217 is a wasteful number, since it uses less digits than its factorization.

102020217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615919.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 102020217 is about 10100.5057794152. The cubic root of 102020217 is about 467.2637402309.

Adding to 102020217 its reverse (712020201), we get a palindrome (814040418).

The spelling of 102020217 in words is "one hundred two million, twenty thousand, two hundred seventeen".