12012221204 has 12 divisors (see below), whose sum is σ = 21238103124. Its totient is φ = 5944191744.

The previous prime is 12012221197. The next prime is 12012221227. The reversal of 12012221204 is 40212221021.

It can be written as a sum of positive squares in 2 ways, for example, as 2367017104 + 9645204100 = 48652^2 + 98210^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15479279 + ... + 15480054.

It is an arithmetic number, because the mean of its divisors is an integer number (1769841927).

Almost surely, 2^12012221204 is an apocalyptic number.

It is an amenable number.

12012221204 is a deficient number, since it is larger than the sum of its proper divisors (9225881920).

12012221204 is a wasteful number, since it uses less digits than its factorization.

12012221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30959434 (or 30959432 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12012221204 its reverse (40212221021), we get a palindrome (52224442225).

The spelling of 12012221204 in words is "twelve billion, twelve million, two hundred twenty-one thousand, two hundred four".