1212144204321 has 24 divisors (see below), whose sum is σ = 1829059989120. Its totient is φ = 772089971136.

The previous prime is 1212144204287. The next prime is 1212144204331. The reversal of 1212144204321 is 1234024412121.

1212144204321 is a `hidden beast` number, since 1 + 2 + 1 + 214 + 420 + 4 + 3 + 21 = 666.

It is not a de Polignac number, because 1212144204321 - 2¹⁰ = 1212144203297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212144204331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3117276 + ... + 3484493.

It is an arithmetic number, because the mean of its divisors is an integer number (76210832880).

Almost surely, 2^{1212144204321} is an apocalyptic number.

It is an amenable number.

1212144204321 is a deficient number, since it is larger than the sum of its proper divisors (616915784799).

1212144204321 is a wasteful number, since it uses less digits than its factorization.

1212144204321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602685 (or 6602682 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1212144204321 its reverse (1234024412121), we get a palindrome (2446168616442).

The spelling of 1212144204321 in words is "one trillion, two hundred twelve billion, one hundred forty-four million, two hundred four thousand, three hundred twenty-one".