21333411441 has 24 divisors (see below), whose sum is σ = 31577945256. Its totient is φ = 13873217280.

The previous prime is 21333411383. The next prime is 21333411443. The reversal of 21333411441 is 14411433312.

21333411441 is a `hidden beast` number, since 213 + 3 + 3 + 4 + 1 + 1 + 441 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2746179216 + 18587232225 = 52404^2 + 136335^2 .

It is not a de Polignac number, because 21333411441 - 2⁷ = 21333411313 is a prime.

It is a super-2 number, since 2×21333411441² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333411443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46740 + ... + 211781.

It is an arithmetic number, because the mean of its divisors is an integer number (1315747719).

Almost surely, 2^21333411441 is an apocalyptic number.

It is an amenable number.

21333411441 is a deficient number, since it is larger than the sum of its proper divisors (10244533815).

21333411441 is a wasteful number, since it uses less digits than its factorization.

21333411441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258753 (or 258750 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21333411441 its reverse (14411433312), we get a palindrome (35744844753).

The spelling of 21333411441 in words is "twenty-one billion, three hundred thirty-three million, four hundred eleven thousand, four hundred forty-one".