1212112224 has 72 divisors (see below), whose sum is σ = 3451593600. Its totient is φ = 403492608.

The previous prime is 1212112207. The next prime is 1212112229. The reversal of 1212112224 is 4222112121.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 1212112197 and 1212112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250177 + ... + 254975.

It is an arithmetic number, because the mean of its divisors is an integer number (47938800).

Almost surely, 2^1212112224 is an apocalyptic number.

It is an amenable number.

1212112224 is an abundant number, since it is smaller than the sum of its proper divisors (2239481376).

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

1212112224 is a wasteful number, since it uses less digits than its factorization.

1212112224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5692 (or 5681 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1212112224 is about 34815.4021088368. The cubic root of 1212112224 is about 1066.2219288321.

Adding to 1212112224 its reverse (4222112121), we get a palindrome (5434224345).

The spelling of 1212112224 in words is "one billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-four".