12121212122 has 16 divisors (see below), whose sum is σ = 18647874432. Its totient is φ = 5905908960.

The previous prime is 12121212121. The next prime is 12121212139. The reversal of 12121212122 is 22121212121.

12121212122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12121212122.

It is not an unprimeable number, because it can be changed into a prime (12121212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126443 + ... + 200574.

It is an arithmetic number, because the mean of its divisors is an integer number (1165492152).

Almost surely, 2^12121212122 is an apocalyptic number.

12121212122 is a deficient number, since it is larger than the sum of its proper divisors (6526662310).

12121212122 is a wasteful number, since it uses less digits than its factorization.

12121212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327493.

The product of its digits is 64, while the sum is 17.

Adding to 12121212122 its reverse (22121212121), we get a palindrome (34242424243).

Subtracting 12121212122 from its reverse (22121212121), we obtain a palindrome (9999999999).

It can be divided in two parts, 121212121 and 22, that multiplied together give a palindrome (2666666662).

The spelling of 12121212122 in words is "twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".