21130223003 has 4 divisors (see below), whose sum is σ = 21150561120. Its totient is φ = 21109884888.

The previous prime is 21130222999. The next prime is 21130223063. The reversal of 21130223003 is 30032203112.

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 21130223003 - 2² = 21130222999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130223063) 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, 10167500 + ... + 10169577.

It is an arithmetic number, because the mean of its divisors is an integer number (5287640280).

Almost surely, 2^21130223003 is an apocalyptic number.

21130223003 is a deficient number, since it is larger than the sum of its proper divisors (20338117).

21130223003 is a wasteful number, since it uses less digits than its factorization.

21130223003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20338116.

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

Adding to 21130223003 its reverse (30032203112), we get a palindrome (51162426115).

The spelling of 21130223003 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, three".