12001142244 has 144 divisors (see below), whose sum is σ = 35393476608. Its totient is φ = 3097620864.

The previous prime is 12001142221. The next prime is 12001142317. The reversal of 12001142244 is 44224110021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12001142244.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 658219 + ... + 676205.

It is an arithmetic number, because the mean of its divisors is an integer number (245788032).

Almost surely, 2^12001142244 is an apocalyptic number.

12001142244 is a gapful number since it is divisible by the number (14) 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 12001142244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17696738304).

12001142244 is an abundant number, since it is smaller than the sum of its proper divisors (23392334364).

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

12001142244 is a wasteful number, since it uses less digits than its factorization.

12001142244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18074 (or 18059 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12001142244 its reverse (44224110021), we get a palindrome (56225252265).

The spelling of 12001142244 in words is "twelve billion, one million, one hundred forty-two thousand, two hundred forty-four".