| Hardware and OS | Samsung Galaxy Note 21 Ultra | |
| Operating System | Android v11 | |
| Processor | Octa core (2.84 GHz, Single core, Kryo 680 2.42 GHz, Tri core, Kryo 680 1.8 GHz, Quad core, Kryo 680) | |
| Chipset | Qualcomm Snapdragon 888 | |
| Architecture | 64 bit | |
| Internal Memory | 128 GB | |
| External memory | Yes, Up to 512 GB | |
| RAM | 12 GB | |
| GPU | Adreno 660 | |
| Display | Samsung Galaxy Note 21 Ultra | other phones |
| Type | Dynamic AMOLED | |
| Size | 6.8 inches (17.27 cm) | |
| Screen format | 20:9 | |
| PPI /points per inch/ | 516 ppi | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | |
| Screen Protection | Corning Gorilla Glass, | |
| Refresh Rate | 120 Hz | |
| Connectivity | Samsung Galaxy Note 21 Ultra | other phones |
| Network Support | 5G, 4G, 3G, 2G | |
| SIM card | SIM1: Nano, SIM2: Nano | |
| SIM Slot(s) | Dual SIM, GSM GSM | |
| Bluetooth | Yes, v5.2 | |
| GPS | Yes with A-GPS, Glonass | |
| USB Connectivity | Mass storage device, USB charging | |
| VoLTE | Yes | |
| Wi-Fi | Yes, Wi-Fi 802.11, b/g/n | |
| Camera | Samsung Galaxy Note 21 Ultra | other phones |
| Camera Setup | Triple | |
| Autofocus | Yes, Phase Detection autofocus | |
| Camera Features | Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Image Resolution | 12000 x 9000 Pixels | |
| Video Recording | 1920x1080 @ 30 fps | |
| Selfie camera | 40 MP f/1.8, Wide Angle, Primary Camera (26 mm focal length, 1.34??m pixel size) | |
| Multimedia | Samsung Galaxy Note 21 Ultra | other phones |
| Loudspeaker | Yes | |
| Design | Samsung Galaxy Note 21 Ultra | other phones |
| Ruggedness | Dust proof | |
| Waterproof | Yes, IP68 | |
| Battery | Samsung Galaxy Note 21 Ultra | other phones |
| Capacity | 5000 mAh | |
| Type | Li-ion | |
| Removable | No | |
| Quick Charging | Yes, Fast, 25W | |
| USB Type-C | Yes | |
| Other features | Samsung Galaxy Note 21 Ultra | other phones |
| Fingerprint Sensor | Yes | |
| Fingerprint Sensor Position | On-screen | |
| Fingerprint Sensor Type | Optical | |
| Other Sensors | Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope | |
