Which command would configure a single anycast address on a router's interface?

The command to configure an anycast address on an interface would be ipv6 address 2001:db8:1:1:1::12/128 anycast. The /128 defines a single IP address to advertise in routing tables. The commands ip address 2001:db8:1:1:1::12/64, ipv6 address 2001:db8:1:1:1::12/64 anycast, and ipv6 anycast address 2001:db8:1:1:1::12/128 are incorrect.