12321401415550 has 24 divisors (see below), whose sum is σ = 22917906425736. Its totient is φ = 4928539105440.

The previous prime is 12321401415487. The next prime is 12321401415551. The reversal of 12321401415550 is 5551410412321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321401415551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16279324 + ... + 17019376.

It is an arithmetic number, because the mean of its divisors is an integer number (954912767739).

Almost surely, 2^{12321401415550} is an apocalyptic number.

12321401415550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12321401415550 is a deficient number, since it is larger than the sum of its proper divisors (10596505010186).

12321401415550 is a wasteful number, since it uses less digits than its factorization.

12321401415550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073052 (or 1073047 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 12321401415550 its reverse (5551410412321), we get a palindrome (17872811827871).

The spelling of 12321401415550 in words is "twelve trillion, three hundred twenty-one billion, four hundred one million, four hundred fifteen thousand, five hundred fifty".