12555444134120 has 32 divisors (see below), whose sum is σ = 28250069931720. Its totient is φ = 5022120652800.

The previous prime is 12555444134081. The next prime is 12555444134147. The reversal of 12555444134120 is 2143144455521.

It can be written as a sum of positive squares in 4 ways, for example, as 9756789499396 + 2798654634724 = 3123586^2 + 1672918^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1879964 + ... + 5352116.

Almost surely, 2^{12555444134120} is an apocalyptic number.

12555444134120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12555444134120 is an abundant number, since it is smaller than the sum of its proper divisors (15694625797600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12555444134120 is a wasteful number, since it uses less digits than its factorization.

12555444134120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562565 (or 3562561 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 12555444134120 its reverse (2143144455521), we get a palindrome (14698588589641).

The spelling of 12555444134120 in words is "twelve trillion, five hundred fifty-five billion, four hundred forty-four million, one hundred thirty-four thousand, one hundred twenty".