21443342412241 has 16 divisors (see below), whose sum is σ = 22998615171840. Its totient is φ = 19920869579520.

The previous prime is 21443342412229. The next prime is 21443342412263. The reversal of 21443342412241 is 14221424334412.

It is a cyclic number.

It is not a de Polignac number, because 21443342412241 - 2¹³ = 21443342404049 is a prime.

It is a super-2 number, since 2×21443342412241² (a number of 27 digits) contains 22 as substring.

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 21443342412241.

It is not an unprimeable number, because it can be changed into a prime (21443342412641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2501010 + ... + 7010116.

It is an arithmetic number, because the mean of its divisors is an integer number (1437413448240).

Almost surely, 2^{21443342412241} is an apocalyptic number.

It is an amenable number.

21443342412241 is a deficient number, since it is larger than the sum of its proper divisors (1555272759599).

21443342412241 is a wasteful number, since it uses less digits than its factorization.

21443342412241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512744.

The product of its digits is 147456, while the sum is 37.

Adding to 21443342412241 its reverse (14221424334412), we get a palindrome (35664766746653).

The spelling of 21443342412241 in words is "twenty-one trillion, four hundred forty-three billion, three hundred forty-two million, four hundred twelve thousand, two hundred forty-one".