12221444140 has 24 divisors (see below), whose sum is σ = 25670196720. Its totient is φ = 4887594048.

The previous prime is 12221444099. The next prime is 12221444141. The reversal of 12221444140 is 4144412221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12221444141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44899 + ... + 162661.

It is an arithmetic number, because the mean of its divisors is an integer number (1069591530).

Almost surely, 2^12221444140 is an apocalyptic number.

12221444140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221444140 is an abundant number, since it is smaller than the sum of its proper divisors (13448752580).

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

12221444140 is a wasteful number, since it uses less digits than its factorization.

12221444140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122961 (or 122959 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 12221444140 its reverse (4144412221), we get a palindrome (16365856361).

The spelling of 12221444140 in words is "twelve billion, two hundred twenty-one million, four hundred forty-four thousand, one hundred forty".