21103022003 has 16 divisors (see below), whose sum is σ = 24193887936. Its totient is φ = 18031265280.

The previous prime is 21103021993. The next prime is 21103022051. The reversal of 21103022003 is 30022030112.

It is a happy number.

It is not a de Polignac number, because 21103022003 - 2¹⁰ = 21103020979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103022053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5871575 + ... + 5875167.

It is an arithmetic number, because the mean of its divisors is an integer number (1512117996).

Almost surely, 2^21103022003 is an apocalyptic number.

21103022003 is a deficient number, since it is larger than the sum of its proper divisors (3090865933).

21103022003 is a wasteful number, since it uses less digits than its factorization.

21103022003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014.

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

Adding to 21103022003 its reverse (30022030112), we get a palindrome (51125052115).

The spelling of 21103022003 in words is "twenty-one billion, one hundred three million, twenty-two thousand, three".