1224111616 has 240 divisors, whose sum is σ = 3163083264. Its totient is φ = 462938112.

The previous prime is 1224111593. The next prime is 1224111643. The reversal of 1224111616 is 6161114221.

It is a super-2 number, since 2×1224111616² = 2996898496852262912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26044905 + ... + 26044951.

Almost surely, 2^1224111616 is an apocalyptic number.

1224111616 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 1224111616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1581541632).

1224111616 is an abundant number, since it is smaller than the sum of its proper divisors (1938971648).

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

1224111616 is an equidigital number, since it uses as much as digits as its factorization.

1224111616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 112 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 1224111616 is about 34987.3064982145. The cubic root of 1224111616 is about 1069.7287622967.

Adding to 1224111616 its reverse (6161114221), we get a palindrome (7385225837).

The spelling of 1224111616 in words is "one billion, two hundred twenty-four million, one hundred eleven thousand, six hundred sixteen".