21003141243 has 8 divisors (see below), whose sum is σ = 32004786688. Its totient is φ = 12001794984.

The previous prime is 21003141241. The next prime is 21003141259. The reversal of 21003141243 is 34214130012.

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

It is not a de Polignac number, because 21003141243 - 2¹ = 21003141241 is a prime.

It is a super-2 number, since 2×21003141243² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1000149583 = 21003141243 / (2 + 1 + 0 + 0 + 3 + 1 + 4 + 1 + 2 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (21003141241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500074771 + ... + 500074812.

It is an arithmetic number, because the mean of its divisors is an integer number (4000598336).

Almost surely, 2^21003141243 is an apocalyptic number.

21003141243 is a deficient number, since it is larger than the sum of its proper divisors (11001645445).

21003141243 is a wasteful number, since it uses less digits than its factorization.

21003141243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000149593.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21003141243 its reverse (34214130012), we get a palindrome (55217271255).

The spelling of 21003141243 in words is "twenty-one billion, three million, one hundred forty-one thousand, two hundred forty-three".