44421312012 has 144 divisors (see below), whose sum is σ = 131887566720. Its totient is φ = 11506924800.

The previous prime is 44421312011. The next prime is 44421312017. The reversal of 44421312012 is 21021312444.

It is not an unprimeable number, because it can be changed into a prime (44421312011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2442312 + ... + 2460432.

It is an arithmetic number, because the mean of its divisors is an integer number (915885880).

Almost surely, 2^44421312012 is an apocalyptic number.

44421312012 is a gapful number since it is divisible by the number (42) 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 44421312012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65943783360).

44421312012 is an abundant number, since it is smaller than the sum of its proper divisors (87466254708).

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

44421312012 is a wasteful number, since it uses less digits than its factorization.

44421312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18532 (or 18523 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 44421312012 its reverse (21021312444), we get a palindrome (65442624456).

The spelling of 44421312012 in words is "forty-four billion, four hundred twenty-one million, three hundred twelve thousand, twelve".