21441002443213 has 32 divisors (see below), whose sum is σ = 22745526276096. Its totient is φ = 20168567008128.

The previous prime is 21441002443207. The next prime is 21441002443243. The reversal of 21441002443213 is 31234420014412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21441002443213 - 2¹⁷ = 21441002312141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441002443243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3380258920 + ... + 3380265262.

It is an arithmetic number, because the mean of its divisors is an integer number (710797696128).

Almost surely, 2^{21441002443213} is an apocalyptic number.

21441002443213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21441002443213 is a deficient number, since it is larger than the sum of its proper divisors (1304523832883).

21441002443213 is a wasteful number, since it uses less digits than its factorization.

21441002443213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9793.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21441002443213 its reverse (31234420014412), we get a palindrome (52675422457625).

The spelling of 21441002443213 in words is "twenty-one trillion, four hundred forty-one billion, two million, four hundred forty-three thousand, two hundred thirteen".