12121436341552 has 20 divisors (see below), whose sum is σ = 23493273912360. Its totient is φ = 6058655977088.

The previous prime is 12121436341517. The next prime is 12121436341559. The reversal of 12121436341552 is 25514363412121.

It is not an unprimeable number, because it can be changed into a prime (12121436341559) 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 3 ways as a sum of consecutive naturals, for example, 128838613 + ... + 128932660.

It is an arithmetic number, because the mean of its divisors is an integer number (1174663695618).

Almost surely, 2^{12121436341552} is an apocalyptic number.

It is an amenable number.

12121436341552 is a deficient number, since it is larger than the sum of its proper divisors (11371837570808).

12121436341552 is a wasteful number, since it uses less digits than its factorization.

12121436341552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257774220 (or 257774214 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

Adding to 12121436341552 its reverse (25514363412121), we get a palindrome (37635799753673).

The spelling of 12121436341552 in words is "twelve trillion, one hundred twenty-one billion, four hundred thirty-six million, three hundred forty-one thousand, five hundred fifty-two".