124221216 has 192 divisors, whose sum is σ = 394813440. Its totient is φ = 33454080.

The previous prime is 124221211. The next prime is 124221257. The reversal of 124221216 is 612122421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 124221192 and 124221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124221211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1395700 + ... + 1395788.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^124221216 is an apocalyptic number.

124221216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124221216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197406720).

124221216 is an abundant number, since it is smaller than the sum of its proper divisors (270592224).

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

124221216 is a wasteful number, since it uses less digits than its factorization.

124221216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 199 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 124221216 is about 11145.4571911609. The cubic root of 124221216 is about 498.9594573776.

Adding to 124221216 its reverse (612122421), we get a palindrome (736343637).

The spelling of 124221216 in words is "one hundred twenty-four million, two hundred twenty-one thousand, two hundred sixteen".