12105324012 has 24 divisors (see below), whose sum is σ = 28247979312. Its totient is φ = 4034790400.

The previous prime is 12105323981. The next prime is 12105324041. The reversal of 12105324012 is 21042350121.

It is a super-2 number, since 2×12105324012² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12105324012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158812 + ... + 222332.

It is an arithmetic number, because the mean of its divisors is an integer number (1176999138).

Almost surely, 2^12105324012 is an apocalyptic number.

12105324012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12105324012 is an abundant number, since it is smaller than the sum of its proper divisors (16142655300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12105324012 is a wasteful number, since it uses less digits than its factorization.

12105324012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79409 (or 79407 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12105324012 its reverse (21042350121), we get a palindrome (33147674133).

The spelling of 12105324012 in words is "twelve billion, one hundred five million, three hundred twenty-four thousand, twelve".