21432301021441 has 4 divisors (see below), whose sum is σ = 21438893550384. Its totient is φ = 21425708492500.

The previous prime is 21432301021399. The next prime is 21432301021457. The reversal of 21432301021441 is 14412010323412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21432301021441 - 2²⁷ = 21432166803713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432301028441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296259595 + ... + 3296266096.

It is an arithmetic number, because the mean of its divisors is an integer number (5359723387596).

Almost surely, 2^{21432301021441} is an apocalyptic number.

It is an amenable number.

21432301021441 is a deficient number, since it is larger than the sum of its proper divisors (6592528943).

21432301021441 is an equidigital number, since it uses as much as digits as its factorization.

21432301021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592528942.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21432301021441 its reverse (14412010323412), we get a palindrome (35844311344853).

The spelling of 21432301021441 in words is "twenty-one trillion, four hundred thirty-two billion, three hundred one million, twenty-one thousand, four hundred forty-one".