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12310131201221 = 731541177759009
BaseRepresentation
bin1011001100100010110011…
…1111110101010011000101
31121120211121012122110220102
42303020230333311103011
53103142122041414341
642103110214013445
72410243345512560
oct263105477652305
947524535573812
1012310131201221
113a16774158577
121469952047285
136b3ac04550c9
14307b564774d7
15165334c56c9b
hexb322cff54c5

12310131201221 has 32 divisors (see below), whose sum is σ = 14557829314560. Its totient is φ = 10186385817600.

The previous prime is 12310131201061. The next prime is 12310131201227. The reversal of 12310131201221 is 12210213101321.

It is a cyclic number.

It is not a de Polignac number, because 12310131201221 - 230 = 12309057459397 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12310131201193 and 12310131201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310131201227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208584965 + ... + 208643973.

It is an arithmetic number, because the mean of its divisors is an integer number (454932166080).

Almost surely, 212310131201221 is an apocalyptic number.

It is an amenable number.

12310131201221 is a deficient number, since it is larger than the sum of its proper divisors (2247698113339).

12310131201221 is a wasteful number, since it uses less digits than its factorization.

12310131201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61365.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12310131201221 its reverse (12210213101321), we get a palindrome (24520344302542).

The spelling of 12310131201221 in words is "twelve trillion, three hundred ten billion, one hundred thirty-one million, two hundred one thousand, two hundred twenty-one".

Divisors: 1 7 31 217 541 1777 3787 12439 16771 55087 59009 117397 385609 413063 961357 1829279 6729499 12804953 29802067 31923869 104858993 208614469 223467083 734012951 989639939 3250628783 6927479573 22754401481 56728715213 397101006491 1758590171603 12310131201221