21200024113 has 4 divisors (see below), whose sum is σ = 21200653168. Its totient is φ = 21199395060.

The previous prime is 21200024059. The next prime is 21200024123. The reversal of 21200024113 is 31142000212.

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 21200024113 - 2¹⁷ = 21199893041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200024123) 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, 260931 + ... + 332392.

It is an arithmetic number, because the mean of its divisors is an integer number (5300163292).

Almost surely, 2^21200024113 is an apocalyptic number.

It is an amenable number.

21200024113 is a deficient number, since it is larger than the sum of its proper divisors (629055).

21200024113 is an equidigital number, since it uses as much as digits as its factorization.

21200024113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629054.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21200024113 its reverse (31142000212), we get a palindrome (52342024325).

The spelling of 21200024113 in words is "twenty-one billion, two hundred million, twenty-four thousand, one hundred thirteen".