21441441312 has 84 divisors (see below), whose sum is σ = 63290372670. Its totient is φ = 7147139328.

The previous prime is 21441441289. The next prime is 21441441367. The reversal of 21441441312 is 21314414412.

21441441312 is a `hidden beast` number, since 214 + 4 + 1 + 441 + 3 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16158477456 + 5282963856 = 127116^2 + 72684^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 436237 + ... + 482892.

Almost surely, 2^21441441312 is an apocalyptic number.

It is an amenable number.

21441441312 is an abundant number, since it is smaller than the sum of its proper divisors (41848931358).

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

21441441312 is an frugal number, since it uses more digits than its factorization.

21441441312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919157 (or 919134 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 21441441312 its reverse (21314414412), we get a palindrome (42755855724).

The spelling of 21441441312 in words is "twenty-one billion, four hundred forty-one million, four hundred forty-one thousand, three hundred twelve".