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102221 = 717859

102221 has 8 divisors (see below), whose sum is σ = 123840. Its totient is φ = 82368.

The previous prime is 102217. The next prime is 102229. The reversal of 102221 is 122201.

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

It is a cyclic number.

It is not a de Polignac number, because 102221 - 22 = 102217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102199 and 102208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311 + ... + 548.

It is an arithmetic number, because the mean of its divisors is an integer number (15480).

2102221 is an apocalyptic number.

It is an amenable number.

102221 is a deficient number, since it is larger than the sum of its proper divisors (21619).

102221 is an equidigital number, since it uses as much as digits as its factorization.

102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 102221 is about 319.7201901663. The cubic root of 102221 is about 46.7570075381.

Adding to 102221 its reverse (122201), we get a palindrome (224422).

It can be divided in two parts, 102 and 221, that added together give a palindrome (323).

The spelling of 102221 in words is "one hundred two thousand, two hundred twenty-one", and thus it is an iban number.

Divisors: 1 7 17 119 859 6013 14603 102221