21132223103 has 4 divisors (see below), whose sum is σ = 21170856600. Its totient is φ = 21093589608.

The previous prime is 21132223087. The next prime is 21132223139. The reversal of 21132223103 is 30132223112.

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 21132223103 - 2⁴ = 21132223087 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 (21132223603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19315928 + ... + 19317021.

It is an arithmetic number, because the mean of its divisors is an integer number (5292714150).

Almost surely, 2^21132223103 is an apocalyptic number.

21132223103 is a deficient number, since it is larger than the sum of its proper divisors (38633497).

21132223103 is an equidigital number, since it uses as much as digits as its factorization.

21132223103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38633496.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21132223103 its reverse (30132223112), we get a palindrome (51264446215).

Subtracting 21132223103 from its reverse (30132223112), we obtain a palindrome (9000000009).

The spelling of 21132223103 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty-three thousand, one hundred three".