Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you solve the rebus below?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Make a sentence consisting of three words that have the whole alphabet.

What 5-letter word typed in all capital letters can be read the same upside down?

what one word does the below rebus identifies?

I am quite hot but become too cold if you remove the first two letters. What am I?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Remove two matchsticks to make the below equation correct.