21130241043 has 4 divisors (see below), whose sum is σ = 28173654728. Its totient is φ = 14086827360.

The previous prime is 21130240951. The next prime is 21130241057. The reversal of 21130241043 is 34014203112.

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

It is not a de Polignac number, because 21130241043 - 2²⁶ = 21063132179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130241063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3521706838 + ... + 3521706843.

It is an arithmetic number, because the mean of its divisors is an integer number (7043413682).

Almost surely, 2^21130241043 is an apocalyptic number.

21130241043 is a deficient number, since it is larger than the sum of its proper divisors (7043413685).

21130241043 is an equidigital number, since it uses as much as digits as its factorization.

21130241043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043413684.

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

Adding to 21130241043 its reverse (34014203112), we get a palindrome (55144444155).

The spelling of 21130241043 in words is "twenty-one billion, one hundred thirty million, two hundred forty-one thousand, forty-three".