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BaseRepresentation
bin11101010110011101
320002220122
4131112131
512321341
62324325
71010333
oct352635
9202818
10120221
1182362
12596a5
134294a
1431b53
152594b
hex1d59d

120221 has 4 divisors (see below), whose sum is σ = 125472. Its totient is φ = 114972.

The previous prime is 120209. The next prime is 120223. The reversal of 120221 is 122021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120221 - 26 = 120157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120199 and 120208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120223) 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, 2591 + ... + 2636.

It is an arithmetic number, because the mean of its divisors is an integer number (31368).

2120221 is an apocalyptic number.

It is an amenable number.

120221 is a deficient number, since it is larger than the sum of its proper divisors (5251).

120221 is an equidigital number, since it uses as much as digits as its factorization.

120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250.

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

The square root of 120221 is about 346.7290008061. The cubic root of 120221 is about 49.3545025211.

Adding to 120221 its reverse (122021), we get a palindrome (242242).

The spelling of 120221 in words is "one hundred twenty thousand, two hundred twenty-one", and thus it is an iban number.

Divisors: 1 23 5227 120221