12311121105 has 24 divisors (see below), whose sum is σ = 22267073088. Its totient is φ = 6280455456.

The previous prime is 12311121103. The next prime is 12311121107. The reversal of 12311121105 is 50112111321.

It is an interprime number because it is at equal distance from previous prime (12311121103) and next prime (12311121107).

It is not a de Polignac number, because 12311121105 - 2¹ = 12311121103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12311121101) 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 in 23 ways as a sum of consecutive naturals, for example, 5946367 + ... + 5948436.

It is an arithmetic number, because the mean of its divisors is an integer number (927794712).

Almost surely, 2^12311121105 is an apocalyptic number.

12311121105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12311121105 is a deficient number, since it is larger than the sum of its proper divisors (9955951983).

12311121105 is a wasteful number, since it uses less digits than its factorization.

12311121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11894837 (or 11894834 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 12311121105 its reverse (50112111321), we get a palindrome (62423232426).

The spelling of 12311121105 in words is "twelve billion, three hundred eleven million, one hundred twenty-one thousand, one hundred five".