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12121221011 is a prime number
BaseRepresentation
bin10110100100111101…
…10010011110010011
31011021202012211022112
423102132302132103
5144311013033021
65322435455535
7606242451524
oct132236623623
934252184275
1012121221011
115160127829
1224234575ab
1311b22c8433
1482db7484b
154ae217d5b
hex2d27b2793

12121221011 has 2 divisors, whose sum is σ = 12121221012. Its totient is φ = 12121221010.

The previous prime is 12121220963. The next prime is 12121221041. The reversal of 12121221011 is 11012212121.

Adding to 12121221011 its reverse (11012212121), we get a palindrome (23133433132).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121221011 - 222 = 12117026707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121221041) 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, 6060610505 + 6060610506.

It is an arithmetic number, because the mean of its divisors is an integer number (6060610506).

Almost surely, 212121221011 is an apocalyptic number.

12121221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121221011 is an equidigital number, since it uses as much as digits as its factorization.

12121221011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

The spelling of 12121221011 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".