21050205324043 has 4 divisors (see below), whose sum is σ = 24057377513200. Its totient is φ = 18043033134888.

The previous prime is 21050205323999. The next prime is 21050205324047. The reversal of 21050205324043 is 34042350205012.

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 21050205324043 - 2⁹ = 21050205323531 is a prime.

It is a super-2 number, since 2×21050205324043² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21050205323996 and 21050205324014.

It is not an unprimeable number, because it can be changed into a prime (21050205324047) 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, 1503586094568 + ... + 1503586094581.

It is an arithmetic number, because the mean of its divisors is an integer number (6014344378300).

Almost surely, 2^{21050205324043} is an apocalyptic number.

21050205324043 is a deficient number, since it is larger than the sum of its proper divisors (3007172189157).

21050205324043 is an equidigital number, since it uses as much as digits as its factorization.

21050205324043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007172189156.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 21050205324043 its reverse (34042350205012), we get a palindrome (55092555529055).

The spelling of 21050205324043 in words is "twenty-one trillion, fifty billion, two hundred five million, three hundred twenty-four thousand, forty-three".