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21224044321120 = 25517292714332293
BaseRepresentation
bin1001101001101100110111…
…00111110101100101100000
32210010222222010210200111001
410310312123213311211200
510240213320321233440
6113050105200001344
74320246414051334
oct464663347654540
983128863720431
1021224044321120
1168430807894a3
122469441600254
13bac55a115394
1453536bc3b7c4
1526c1458b9b9a
hex134d9b9f5960

21224044321120 has 384 divisors, whose sum is σ = 55276127101440. Its totient is φ = 7665140367360.

The previous prime is 21224044321079. The next prime is 21224044321127. The reversal of 21224044321120 is 2112344042212.

It is a super-2 number, since 2×212240443211202 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224044321127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9256014694 + ... + 9256016986.

It is an arithmetic number, because the mean of its divisors is an integer number (143948247660).

Almost surely, 221224044321120 is an apocalyptic number.

21224044321120 is a gapful number since it is divisible by the number (20) 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 21224044321120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27638063550720).

21224044321120 is an abundant number, since it is smaller than the sum of its proper divisors (34052082780320).

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

21224044321120 is a wasteful number, since it uses less digits than its factorization.

21224044321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21224044321120 its reverse (2112344042212), we get a palindrome (23336388363332).

The spelling of 21224044321120 in words is "twenty-one trillion, two hundred twenty-four billion, forty-four million, three hundred twenty-one thousand, one hundred twenty".