21043142234303 has 8 divisors (see below), whose sum is σ = 24222321997440. Its totient is φ = 17907216617880.

The previous prime is 21043142234269. The next prime is 21043142234339. The reversal of 21043142234303 is 30343224134012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21043142234303 - 2¹² = 21043142230207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21043142234303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043142234003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10813535633 + ... + 10813537578.

It is an arithmetic number, because the mean of its divisors is an integer number (3027790249680).

Almost surely, 2^{21043142234303} is an apocalyptic number.

21043142234303 is a deficient number, since it is larger than the sum of its proper divisors (3179179763137).

21043142234303 is a wasteful number, since it uses less digits than its factorization.

21043142234303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21627073357.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 21043142234303 its reverse (30343224134012), we get a palindrome (51386366368315).

The spelling of 21043142234303 in words is "twenty-one trillion, forty-three billion, one hundred forty-two million, two hundred thirty-four thousand, three hundred three".