65441021420421 has 12 divisors (see below), whose sum is σ = 94526538113280. Its totient is φ = 43627062251880.

The previous prime is 65441021420413. The next prime is 65441021420497. The reversal of 65441021420421 is 12402412014456.

65441021420421 is a `hidden beast` number, since 6 + 5 + 4 + 4 + 10 + 214 + 2 + 0 + 421 = 666.

It is not a de Polignac number, because 65441021420421 - 2³ = 65441021420413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65441021420521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22323045 + ... + 25083866.

It is an arithmetic number, because the mean of its divisors is an integer number (7877211509440).

Almost surely, 2^{65441021420421} is an apocalyptic number.

It is an amenable number.

65441021420421 is a deficient number, since it is larger than the sum of its proper divisors (29085516692859).

65441021420421 is a wasteful number, since it uses less digits than its factorization.

65441021420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47560296 (or 47560293 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

Adding to 65441021420421 its reverse (12402412014456), we get a palindrome (77843433434877).

The spelling of 65441021420421 in words is "sixty-five trillion, four hundred forty-one billion, twenty-one million, four hundred twenty thousand, four hundred twenty-one".