12415550421 has 16 divisors (see below), whose sum is σ = 16606049600. Its totient is φ = 8251072128.

The previous prime is 12415550377. The next prime is 12415550447. The reversal of 12415550421 is 12405551421.

It is not a de Polignac number, because 12415550421 - 2¹⁴ = 12415534037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12415550621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487090 + ... + 2492076.

It is an arithmetic number, because the mean of its divisors is an integer number (1037878100).

Almost surely, 2^12415550421 is an apocalyptic number.

It is an amenable number.

12415550421 is a deficient number, since it is larger than the sum of its proper divisors (4190499179).

12415550421 is a wasteful number, since it uses less digits than its factorization.

12415550421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428.

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 12415550421 in words is "twelve billion, four hundred fifteen million, five hundred fifty thousand, four hundred twenty-one".