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121221211222 = 2193873126353
BaseRepresentation
bin111000011100101011…
…0001110010001010110
3102120220010002120100201
41300321112032101112
53441230112224342
6131404355131114
711520655202656
oct1607126162126
9376803076321
10121221211222
11474562391a1
121b5b08a3a9a
13b57b1c7367
145c1d5d8366
1532472d0db7
hex1c3958e456

121221211222 has 8 divisors (see below), whose sum is σ = 181841254056. Its totient is φ = 60607459872.

The previous prime is 121221211159. The next prime is 121221211249. The reversal of 121221211222 is 222112122121.

Adding to 121221211222 its reverse (222112122121), we get a palindrome (343333333343).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 121221211222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524403 + ... + 1601950.

It is an arithmetic number, because the mean of its divisors is an integer number (22730156757).

Almost surely, 2121221211222 is an apocalyptic number.

121221211222 is a deficient number, since it is larger than the sum of its proper divisors (60620042834).

121221211222 is a wasteful number, since it uses less digits than its factorization.

121221211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145742.

The product of its digits is 128, while the sum is 19.

The spelling of 121221211222 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-two".

Divisors: 1 2 19387 38774 3126353 6252706 60610605611 121221211222