Base | Representation |
---|---|

bin | 1100111000000111011… |

… | …1011000011110010000 |

3 | 210011000100102122000222 |

4 | 3032001313120132100 |

5 | 12111030330023440 |

6 | 245343353332212 |

7 | 21661042630043 |

oct | 3160167303620 |

9 | 704010378028 |

10 | 221222111120 |

11 | 8590212940a |

12 | 36a5aa07068 |

13 | 17b26c6058a |

14 | a9c8810c5a |

15 | 5b4b6472b5 |

hex | 3381dd8790 |

221222111120 has 80 divisors (see below), whose sum is σ = 551158473600. Its totient is φ = 82280159232.

The previous prime is 221222111107. The next prime is 221222111179. The reversal of 221222111120 is 21111222122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867020 + ... + 1092779.

It is an arithmetic number, because the mean of its divisors is an integer number (6889480920).

Almost surely, 2^{221222111120} is an apocalyptic number.

221222111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222111120 is an abundant number, since it is smaller than the sum of its proper divisors (329936362480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221222111120 is a wasteful number, since it uses less digits than its factorization.

221222111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959912 (or 1959906 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221222111120 its reverse (21111222122), we get a palindrome (242333333242).

The spelling of 221222111120 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 16 17 20 34 40 68 80 83 85 136 166 170 272 332 340 415 664 680 830 1328 1360 1411 1660 2822 3320 5644 6640 7055 11288 14110 22576 28220 56440 112880 1959799 3919598 7839196 9798995 15678392 19597990 31356784 33316583 39195980 66633166 78391960 133266332 156783920 162663317 166582915 266532664 325326634 333165830 533065328 650653268 666331660 813316585 1301306536 1332663320 1626633170 2602613072 2665326640 2765276389 3253266340 5530552778 6506532680 11061105556 13013065360 13826381945 22122211112 27652763890 44244422224 55305527780 110611055560 221222111120

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