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110201221 = 138477017
BaseRepresentation
bin1101001000110…
…00100110000101
321200100210122201
412210120212011
5211202414341
614533554501
72505460234
oct644304605
9250323581
10110201221
1157229899
1230aa5a31
1319aa5b30
14108c8b1b
159a1c331
hex6918985

110201221 has 4 divisors (see below), whose sum is σ = 118678252. Its totient is φ = 101724192.

The previous prime is 110201219. The next prime is 110201237. The reversal of 110201221 is 122102011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20160100 + 90041121 = 4490^2 + 9489^2 .

It is a cyclic number.

It is not a de Polignac number, because 110201221 - 21 = 110201219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110201198 and 110201207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110201521) 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, 4238496 + ... + 4238521.

It is an arithmetic number, because the mean of its divisors is an integer number (29669563).

Almost surely, 2110201221 is an apocalyptic number.

It is an amenable number.

110201221 is a deficient number, since it is larger than the sum of its proper divisors (8477031).

110201221 is an equidigital number, since it uses as much as digits as its factorization.

110201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477030.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 110201221 is about 10497.6769334934. The cubic root of 110201221 is about 479.4339696459.

Adding to 110201221 its reverse (122102011), we get a palindrome (232303232).

The spelling of 110201221 in words is "one hundred ten million, two hundred one thousand, two hundred twenty-one".

Divisors: 1 13 8477017 110201221