21443055140311 has 4 divisors (see below), whose sum is σ = 24506348731792. Its totient is φ = 18379761548832.

The previous prime is 21443055140263. The next prime is 21443055140341. The reversal of 21443055140311 is 11304155034412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21443055140311 - 2⁹ = 21443055139799 is a prime.

It is a super-2 number, since 2×21443055140311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443055140341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531646795730 + ... + 1531646795743.

It is an arithmetic number, because the mean of its divisors is an integer number (6126587182948).

Almost surely, 2^{21443055140311} is an apocalyptic number.

21443055140311 is a deficient number, since it is larger than the sum of its proper divisors (3063293591481).

21443055140311 is an equidigital number, since it uses as much as digits as its factorization.

21443055140311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063293591480.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 21443055140311 in words is "twenty-one trillion, four hundred forty-three billion, fifty-five million, one hundred forty thousand, three hundred eleven".