21032013241 has 4 divisors (see below), whose sum is σ = 21521129872. Its totient is φ = 20542896612.

The previous prime is 21032013239. The next prime is 21032013293. The reversal of 21032013241 is 14231023012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21032013241 - 2¹ = 21032013239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21032013941) 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, 244558251 + ... + 244558336.

It is an arithmetic number, because the mean of its divisors is an integer number (5380282468).

Almost surely, 2^21032013241 is an apocalyptic number.

It is an amenable number.

21032013241 is a deficient number, since it is larger than the sum of its proper divisors (489116631).

21032013241 is an equidigital number, since it uses as much as digits as its factorization.

21032013241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489116630.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21032013241 its reverse (14231023012), we get a palindrome (35263036253).

The spelling of 21032013241 in words is "twenty-one billion, thirty-two million, thirteen thousand, two hundred forty-one".