21210233003 has 4 divisors (see below), whose sum is σ = 21365052360. Its totient is φ = 21055413648.

The previous prime is 21210232987. The next prime is 21210233029. The reversal of 21210233003 is 30033201212.

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 21210233003 - 2⁴ = 21210232987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210235003) 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, 77409473 + ... + 77409746.

It is an arithmetic number, because the mean of its divisors is an integer number (5341263090).

Almost surely, 2^21210233003 is an apocalyptic number.

21210233003 is a deficient number, since it is larger than the sum of its proper divisors (154819357).

21210233003 is a wasteful number, since it uses less digits than its factorization.

21210233003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154819356.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21210233003 its reverse (30033201212), we get a palindrome (51243434215).

The spelling of 21210233003 in words is "twenty-one billion, two hundred ten million, two hundred thirty-three thousand, three".