12129205214 has 16 divisors (see below), whose sum is σ = 20804140896. Its totient is φ = 5195426400.

The previous prime is 12129205201. The next prime is 12129205261. The reversal of 12129205214 is 41250292121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206717 + ... + 258824.

It is an arithmetic number, because the mean of its divisors is an integer number (1300258806).

Almost surely, 2^12129205214 is an apocalyptic number.

12129205214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12129205214 is a deficient number, since it is larger than the sum of its proper divisors (8674935682).

12129205214 is a wasteful number, since it uses less digits than its factorization.

12129205214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467411.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 12129205214 its reverse (41250292121), we get a palindrome (53379497335).

The spelling of 12129205214 in words is "twelve billion, one hundred twenty-nine million, two hundred five thousand, two hundred fourteen".