221068 has 12 divisors (see below), whose sum is σ = 409752. Its totient is φ = 104000.

The previous prime is 221059. The next prime is 221069. The reversal of 221068 is 860122.

It is a happy number.

221068 is nontrivially palindromic in base 3 and base 6.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (221069) 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, 1558 + ... + 1693.

It is an arithmetic number, because the mean of its divisors is an integer number (34146).

2²²¹⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

221068 is a deficient number, since it is larger than the sum of its proper divisors (188684).

221068 is a wasteful number, since it uses less digits than its factorization.

221068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272 (or 3270 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 221068 is about 470.1786894363. The cubic root of 221068 is about 60.4656362920.

It can be divided in two parts, 2210 and 68, that added together give a triangular number (2278 = T₆₇).

The spelling of 221068 in words is "two hundred twenty-one thousand, sixty-eight".