221123 has 8 divisors (see below), whose sum is σ = 261120.
Its totient is φ = 183240.
The previous prime is 221101. The next prime is 221159. The reversal of 221123 is 321122.
It is a happy number.
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 221123 - 26 = 221059 is a prime.
It is a super-2 number, since 2×2211232 = 97790762258, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (221173) 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, 293 + ... + 726.
It is an arithmetic number, because the mean of its divisors is an integer number (32640).
2221123 is an apocalyptic number.
221123 is a deficient number, since it is larger than the sum of its proper divisors (39997).
221123 is a wasteful number, since it uses less digits than its factorization.
221123 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1057.
The product of its digits is 24, while the sum is 11.
The square root of 221123 is about 470.2371742004.
The cubic root of 221123 is about 60.4706503363.
Adding to 221123 its reverse (321122), we get a palindrome (542245).
Subtracting 221123 from its reverse (321122), we obtain a palindrome (99999).
The spelling of 221123 in words is "two hundred twenty-one thousand, one hundred twenty-three", and thus it is an iban number.