21133132103 has 4 divisors (see below), whose sum is σ = 21133981440. Its totient is φ = 21132282768.

The previous prime is 21133132099. The next prime is 21133132169. The reversal of 21133132103 is 30123133112.

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

It is a cyclic number.

It is not a de Polignac number, because 21133132103 - 2² = 21133132099 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 (21133132403) 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, 386183 + ... + 437496.

It is an arithmetic number, because the mean of its divisors is an integer number (5283495360).

Almost surely, 2^21133132103 is an apocalyptic number.

21133132103 is a deficient number, since it is larger than the sum of its proper divisors (849337).

21133132103 is an equidigital number, since it uses as much as digits as its factorization.

21133132103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849336.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21133132103 its reverse (30123133112), we get a palindrome (51256265215).

The spelling of 21133132103 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-two thousand, one hundred three".