21223210003 has 4 divisors (see below), whose sum is σ = 22145958288. Its totient is φ = 20300461720.

The previous prime is 21223209979. The next prime is 21223210031. The reversal of 21223210003 is 30001232212.

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 21223210003 - 2⁵ = 21223209971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223210303) 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, 461374108 + ... + 461374153.

It is an arithmetic number, because the mean of its divisors is an integer number (5536489572).

Almost surely, 2^21223210003 is an apocalyptic number.

21223210003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21223210003 is a deficient number, since it is larger than the sum of its proper divisors (922748285).

21223210003 is an equidigital number, since it uses as much as digits as its factorization.

21223210003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922748284.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21223210003 its reverse (30001232212), we get a palindrome (51224442215).

The spelling of 21223210003 in words is "twenty-one billion, two hundred twenty-three million, two hundred ten thousand, three".