21021305300043 has 32 divisors (see below), whose sum is σ = 28347798758400. Its totient is φ = 13855105728000.

The previous prime is 21021305300041. The next prime is 21021305300053. The reversal of 21021305300043 is 34000350312012.

It is not a de Polignac number, because 21021305300043 - 2¹ = 21021305300041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021305299986 and 21021305300022.

It is not an unprimeable number, because it can be changed into a prime (21021305300041) 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, 290189038 + ... + 290261468.

It is an arithmetic number, because the mean of its divisors is an integer number (885868711200).

Almost surely, 2^{21021305300043} is an apocalyptic number.

21021305300043 is a deficient number, since it is larger than the sum of its proper divisors (7326493458357).

21021305300043 is a wasteful number, since it uses less digits than its factorization.

21021305300043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74483.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 21021305300043 its reverse (34000350312012), we get a palindrome (55021655612055).

The spelling of 21021305300043 in words is "twenty-one trillion, twenty-one billion, three hundred five million, three hundred thousand, forty-three".