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12121101211 is a prime number
BaseRepresentation
bin10110100100111100…
…10101001110011011
31011021201222201222111
423102132111032123
5144311000214321
65322433133151
7606241442332
oct132236251633
934251881874
1012121101211
11516005581a
1224233ba1b7
1311b2285a4b
1482db42d19
154ae1e25e1
hex2d279539b

12121101211 has 2 divisors, whose sum is σ = 12121101212. Its totient is φ = 12121101210.

The previous prime is 12121101199. The next prime is 12121101229. The reversal of 12121101211 is 11210112121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12121101211 - 233 = 3531166619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121101191 and 12121101200.

It is not a weakly prime, because it can be changed into another prime (12121101011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060550605 + 6060550606.

It is an arithmetic number, because the mean of its divisors is an integer number (6060550606).

Almost surely, 212121101211 is an apocalyptic number.

12121101211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121101211 is an equidigital number, since it uses as much as digits as its factorization.

12121101211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12121101211 its reverse (11210112121), we get a palindrome (23331213332).

The spelling of 12121101211 in words is "twelve billion, one hundred twenty-one million, one hundred one thousand, two hundred eleven".