12121113212 has 48 divisors (see below), whose sum is σ = 23598876672. Its totient is φ = 5409685440.

The previous prime is 12121113211. The next prime is 12121113217. The reversal of 12121113212 is 21231112121.

It is a happy number.

12121113212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121113211) 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 15 ways as a sum of consecutive naturals, for example, 3072113 + ... + 3076055.

It is an arithmetic number, because the mean of its divisors is an integer number (491643264).

Almost surely, 2^12121113212 is an apocalyptic number.

It is an amenable number.

12121113212 is a deficient number, since it is larger than the sum of its proper divisors (11477763460).

12121113212 is a wasteful number, since it uses less digits than its factorization.

12121113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898 (or 5896 counting only the distinct ones).

The product of its digits is 48, while the sum is 17.

Adding to 12121113212 its reverse (21231112121), we get a palindrome (33352225333).

The spelling of 12121113212 in words is "twelve billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred twelve".