21223000103 has 4 divisors (see below), whose sum is σ = 21256006968. Its totient is φ = 21189993240.

The previous prime is 21223000093. The next prime is 21223000147. The reversal of 21223000103 is 30100032212.

It is a happy number.

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 21223000103 - 2⁴ = 21223000087 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 (21223080103) 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, 16502468 + ... + 16503753.

It is an arithmetic number, because the mean of its divisors is an integer number (5314001742).

Almost surely, 2^21223000103 is an apocalyptic number.

21223000103 is a deficient number, since it is larger than the sum of its proper divisors (33006865).

21223000103 is an equidigital number, since it uses as much as digits as its factorization.

21223000103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33006864.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21223000103 its reverse (30100032212), we get a palindrome (51323032315).

The spelling of 21223000103 in words is "twenty-one billion, two hundred twenty-three million, one hundred three", and thus it is an aban number.