21321414441 has 6 divisors (see below), whose sum is σ = 30797598650. Its totient is φ = 14214276288.

The previous prime is 21321414419. The next prime is 21321414473. The reversal of 21321414441 is 14441412312.

21321414441 is a `hidden beast` number, since 2 + 1 + 3 + 214 + 1 + 4 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14154098841 + 7167315600 = 118971^2 + 84660^2 .

It is not a de Polignac number, because 21321414441 - 2⁷ = 21321414313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21321414341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184523016 + ... + 1184523033.

Almost surely, 2^21321414441 is an apocalyptic number.

It is an amenable number.

21321414441 is a deficient number, since it is larger than the sum of its proper divisors (9476184209).

21321414441 is a wasteful number, since it uses less digits than its factorization.

21321414441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369046055 (or 2369046052 counting only the distinct ones).

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

Adding to 21321414441 its reverse (14441412312), we get a palindrome (35762826753).

The spelling of 21321414441 in words is "twenty-one billion, three hundred twenty-one million, four hundred fourteen thousand, four hundred forty-one".