21133101103 has 4 divisors (see below), whose sum is σ = 21582741600. Its totient is φ = 20683460608.

The previous prime is 21133101091. The next prime is 21133101107. The reversal of 21133101103 is 30110133112.

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 21133101103 - 2⁵ = 21133101071 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 (21133101107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224820178 + ... + 224820271.

It is an arithmetic number, because the mean of its divisors is an integer number (5395685400).

Almost surely, 2^21133101103 is an apocalyptic number.

21133101103 is a deficient number, since it is larger than the sum of its proper divisors (449640497).

21133101103 is an equidigital number, since it uses as much as digits as its factorization.

21133101103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449640496.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21133101103 its reverse (30110133112), we get a palindrome (51243234215).

The spelling of 21133101103 in words is "twenty-one billion, one hundred thirty-three million, one hundred one thousand, one hundred three".