21104021030 has 16 divisors (see below), whose sum is σ = 37995349104. Its totient is φ = 8439805920.

The previous prime is 21104021023. The next prime is 21104021033. The reversal of 21104021030 is 3012040112.

It is a junction number, because it is equal to n+sod(n) for n = 21104020996 and 21104021014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104021033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175616 + ... + 270275.

It is an arithmetic number, because the mean of its divisors is an integer number (2374709319).

Almost surely, 2^21104021030 is an apocalyptic number.

21104021030 is a deficient number, since it is larger than the sum of its proper divisors (16891328074).

21104021030 is a wasteful number, since it uses less digits than its factorization.

21104021030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450631.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21104021030 its reverse (3012040112), we get a palindrome (24116061142).

The spelling of 21104021030 in words is "twenty-one billion, one hundred four million, twenty-one thousand, thirty".