21133103113 has 4 divisors (see below), whose sum is σ = 21704268100. Its totient is φ = 20561938128.

The previous prime is 21133103081. The next prime is 21133103119. The reversal of 21133103113 is 31130133112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18809573904 + 2323529209 = 137148^2 + 48203^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133103113 - 2⁵ = 21133103081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133103119) 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, 285582438 + ... + 285582511.

It is an arithmetic number, because the mean of its divisors is an integer number (5426067025).

Almost surely, 2^21133103113 is an apocalyptic number.

It is an amenable number.

21133103113 is a deficient number, since it is larger than the sum of its proper divisors (571164987).

21133103113 is an equidigital number, since it uses as much as digits as its factorization.

21133103113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571164986.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21133103113 its reverse (31130133112), we get a palindrome (52263236225).

The spelling of 21133103113 in words is "twenty-one billion, one hundred thirty-three million, one hundred three thousand, one hundred thirteen".