221107 has 4 divisors (see below), whose sum is σ = 222976. Its totient is φ = 219240.

The previous prime is 221101. The next prime is 221159. The reversal of 221107 is 701122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 701122 = 2 ⋅350561.

It is a cyclic number.

It is not a de Polignac number, because 221107 - 2¹¹ = 219059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744 + ... + 997.

It is an arithmetic number, because the mean of its divisors is an integer number (55744).

2²²¹¹⁰⁷ is an apocalyptic number.

221107 is a deficient number, since it is larger than the sum of its proper divisors (1869).

221107 is a wasteful number, since it uses less digits than its factorization.

221107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 221107 is about 470.2201612011. The cubic root of 221107 is about 60.4691917910.

Adding to 221107 its reverse (701122), we get a palindrome (922229).

The spelling of 221107 in words is "two hundred twenty-one thousand, one hundred seven", and thus it is an iban number.