21443241032213 has 32 divisors (see below), whose sum is σ = 28795840174080. Its totient is φ = 15421076717760.

The previous prime is 21443241032207. The next prime is 21443241032221. The reversal of 21443241032213 is 31223014234412.

It is a happy number.

It is not a de Polignac number, because 21443241032213 - 2¹⁶ = 21443240966677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21443241032213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443241032713) 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 31 ways as a sum of consecutive naturals, for example, 4047248 + ... + 7698486.

It is an arithmetic number, because the mean of its divisors is an integer number (899870005440).

Almost surely, 2^{21443241032213} is an apocalyptic number.

It is an amenable number.

21443241032213 is a deficient number, since it is larger than the sum of its proper divisors (7352599141867).

21443241032213 is a wasteful number, since it uses less digits than its factorization.

21443241032213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657137.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21443241032213 its reverse (31223014234412), we get a palindrome (52666255266625).

The spelling of 21443241032213 in words is "twenty-one trillion, four hundred forty-three billion, two hundred forty-one million, thirty-two thousand, two hundred thirteen".