21033103133 has 4 divisors (see below), whose sum is σ = 24037832160. Its totient is φ = 18028374108.

The previous prime is 21033103097. The next prime is 21033103187. The reversal of 21033103133 is 33130133012.

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 21033103133 - 2²⁴ = 21016325917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033193133) 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, 1502364503 + ... + 1502364516.

It is an arithmetic number, because the mean of its divisors is an integer number (6009458040).

Almost surely, 2^21033103133 is an apocalyptic number.

It is an amenable number.

21033103133 is a deficient number, since it is larger than the sum of its proper divisors (3004729027).

21033103133 is an equidigital number, since it uses as much as digits as its factorization.

21033103133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004729026.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21033103133 its reverse (33130133012), we get a palindrome (54163236145).

The spelling of 21033103133 in words is "twenty-one billion, thirty-three million, one hundred three thousand, one hundred thirty-three".