21443503314241 has 4 divisors (see below), whose sum is σ = 21942189437872. Its totient is φ = 20944817190612.

The previous prime is 21443503314223. The next prime is 21443503314281. The reversal of 21443503314241 is 14241330534412.

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 a de Polignac number, because none of the positive numbers 2^k-21443503314241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443503314241.

It is not an unprimeable number, because it can be changed into a prime (21443503314281) 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, 249343061751 + ... + 249343061836.

It is an arithmetic number, because the mean of its divisors is an integer number (5485547359468).

Almost surely, 2^{21443503314241} is an apocalyptic number.

It is an amenable number.

21443503314241 is a deficient number, since it is larger than the sum of its proper divisors (498686123631).

21443503314241 is an equidigital number, since it uses as much as digits as its factorization.

21443503314241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498686123630.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 21443503314241 its reverse (14241330534412), we get a palindrome (35684833848653).

The spelling of 21443503314241 in words is "twenty-one trillion, four hundred forty-three billion, five hundred three million, three hundred fourteen thousand, two hundred forty-one".