21033301440043 has 4 divisors (see below), whose sum is σ = 21389798074680. Its totient is φ = 20676804805408.

The previous prime is 21033301439989. The next prime is 21033301440059. The reversal of 21033301440043 is 34004410333012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033301440043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033301439993 and 21033301440020.

It is not an unprimeable number, because it can be changed into a prime (21033301440083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178248317230 + ... + 178248317347.

It is an arithmetic number, because the mean of its divisors is an integer number (5347449518670).

Almost surely, 2^{21033301440043} is an apocalyptic number.

21033301440043 is a deficient number, since it is larger than the sum of its proper divisors (356496634637).

21033301440043 is an equidigital number, since it uses as much as digits as its factorization.

21033301440043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356496634636.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21033301440043 its reverse (34004410333012), we get a palindrome (55037711773055).

The spelling of 21033301440043 in words is "twenty-one trillion, thirty-three billion, three hundred one million, four hundred forty thousand, forty-three".