In botanical terms, this is not a fruit: it's an accessory fruit called a syconium. It is formed when several flowers of an inflorescence form fruits and fuse together. The strawberry is a good example of this type of accessory fruit.

The figs we buy at the store formed without being fertilized.

All figs have a symbiotic relationship with at least one species of wasps.

The wasps feed on the accessory fruit and disperse the seeds that stick to their back.