12225121012 has 24 divisors (see below), whose sum is σ = 23662348136. Its totient is φ = 5489866368.

The previous prime is 12225121001. The next prime is 12225121021. The reversal of 12225121012 is 21012152221.

It is a happy number.

12225121012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5939168356 + 6285952656 = 77066^2 + 79284^2 .

It is a congruent number.

It is an unprimeable number.

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, 3175083 + ... + 3178930.

Almost surely, 2^12225121012 is an apocalyptic number.

It is an amenable number.

12225121012 is a deficient number, since it is larger than the sum of its proper divisors (11437227124).

12225121012 is a wasteful number, since it uses less digits than its factorization.

12225121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6354067 (or 6354065 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 12225121012 its reverse (21012152221), we get a palindrome (33237273233).

The spelling of 12225121012 in words is "twelve billion, two hundred twenty-five million, one hundred twenty-one thousand, twelve".