21103302133 has 8 divisors (see below), whose sum is σ = 21490876800. Its totient is φ = 20716723968.

The previous prime is 21103302113. The next prime is 21103302137. The reversal of 21103302133 is 33120330112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21103302133 - 2⁹ = 21103301621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21103302133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103302137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206316 + ... + 291157.

It is an arithmetic number, because the mean of its divisors is an integer number (2686359600).

Almost surely, 2^21103302133 is an apocalyptic number.

It is an amenable number.

21103302133 is a deficient number, since it is larger than the sum of its proper divisors (387574667).

21103302133 is an equidigital number, since it uses as much as digits as its factorization.

21103302133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498251.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21103302133 its reverse (33120330112), we get a palindrome (54223632245).

The spelling of 21103302133 in words is "twenty-one billion, one hundred three million, three hundred two thousand, one hundred thirty-three".