12222144440 has 64 divisors (see below), whose sum is σ = 31578768000. Its totient is φ = 4210496640.

The previous prime is 12222144439. The next prime is 12222144457. The reversal of 12222144440 is 4444122221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722630 + ... + 739349.

It is an arithmetic number, because the mean of its divisors is an integer number (493418250).

Almost surely, 2^12222144440 is an apocalyptic number.

12222144440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222144440 is an abundant number, since it is smaller than the sum of its proper divisors (19356623560).

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

12222144440 is a wasteful number, since it uses less digits than its factorization.

12222144440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462020 (or 1462016 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 12222144440 its reverse (4444122221), we get a palindrome (16666266661).

It can be divided in two parts, 122221 and 44440, that added together give a palindrome (166661).

The spelling of 12222144440 in words is "twelve billion, two hundred twenty-two million, one hundred forty-four thousand, four hundred forty".