21033103223 has 4 divisors (see below), whose sum is σ = 22945203528. Its totient is φ = 19121002920.

The previous prime is 21033103211. The next prime is 21033103243. The reversal of 21033103223 is 32230133012.

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 21033103223 - 2⁴ = 21033103207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033103195 and 21033103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033103243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956050136 + ... + 956050157.

It is an arithmetic number, because the mean of its divisors is an integer number (5736300882).

Almost surely, 2^21033103223 is an apocalyptic number.

21033103223 is a deficient number, since it is larger than the sum of its proper divisors (1912100305).

21033103223 is a wasteful number, since it uses less digits than its factorization.

21033103223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912100304.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21033103223 its reverse (32230133012), we get a palindrome (53263236235).

The spelling of 21033103223 in words is "twenty-one billion, thirty-three million, one hundred three thousand, two hundred twenty-three".