21301103232433 has 4 divisors (see below), whose sum is σ = 21309193285668. Its totient is φ = 21293013179200.

The previous prime is 21301103232407. The next prime is 21301103232529. The reversal of 21301103232433 is 33423230110312.

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 14184623997504 + 7116479234929 = 3766248^2 + 2667673^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301103232433 - 2³³ = 21292513297841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301103232403) 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, 4045022668 + ... + 4045027933.

It is an arithmetic number, because the mean of its divisors is an integer number (5327298321417).

Almost surely, 2^{21301103232433} is an apocalyptic number.

It is an amenable number.

21301103232433 is a deficient number, since it is larger than the sum of its proper divisors (8090053235).

21301103232433 is an equidigital number, since it uses as much as digits as its factorization.

21301103232433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8090053234.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21301103232433 its reverse (33423230110312), we get a palindrome (54724333342745).

The spelling of 21301103232433 in words is "twenty-one trillion, three hundred one billion, one hundred three million, two hundred thirty-two thousand, four hundred thirty-three".