103221 has 8 divisors (see below), whose sum is σ = 152960. Its totient is φ = 68796.

The previous prime is 103217. The next prime is 103231. The reversal of 103221 is 122301.

It is a happy number.

It is not a de Polignac number, because 103221 - 2² = 103217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103231) 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, 1885 + ... + 1938.

It is an arithmetic number, because the mean of its divisors is an integer number (19120).

2¹⁰³²²¹ is an apocalyptic number.

It is an amenable number.

103221 is a deficient number, since it is larger than the sum of its proper divisors (49739).

103221 is an equidigital number, since it uses as much as digits as its factorization.

103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832 (or 3826 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 103221 is about 321.2802514939. The cubic root of 103221 is about 46.9089833569.

Adding to 103221 its reverse (122301), we get a palindrome (225522).

It can be divided in two parts, 103 and 221, that added together give a square (324 = 18²).

The spelling of 103221 in words is "one hundred three thousand, two hundred twenty-one", and thus it is an iban number.