12216408050 has 270 divisors, whose sum is σ = 30176290599. Its totient is φ = 3676411200.

The previous prime is 12216408031. The next prime is 12216408091. The reversal of 12216408050 is 5080461221.

It can be written as a sum of positive squares in 5 ways, for example, as 4685813209 + 7530594841 = 68453^2 + 86779^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78155.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

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 134 ways as a sum of consecutive naturals, for example, 421255436 + ... + 421255464.

Almost surely, 2^12216408050 is an apocalyptic number.

12216408050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12216408050 is an abundant number, since it is smaller than the sum of its proper divisors (17959882549).

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

12216408050 is an equidigital number, since it uses as much as digits as its factorization.

12216408050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 12216408050 its reverse (5080461221), we get a palindrome (17296869271).

The spelling of 12216408050 in words is "twelve billion, two hundred sixteen million, four hundred eight thousand, fifty".