21130223104 has 20 divisors (see below), whose sum is σ = 42219177264. Its totient is φ = 10565111296.

The previous prime is 21130223099. The next prime is 21130223111. The reversal of 21130223104 is 40132203112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20634472 + ... + 20635495.

Almost surely, 2^21130223104 is an apocalyptic number.

It is an amenable number.

21130223104 is a deficient number, since it is larger than the sum of its proper divisors (21088954160).

21130223104 is an frugal number, since it uses more digits than its factorization.

21130223104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41269985 (or 41269969 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21130223104 its reverse (40132203112), we get a palindrome (61262426216).

The spelling of 21130223104 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, one hundred four".