21120030104 has 32 divisors (see below), whose sum is σ = 41980641120. Its totient is φ = 9926708736.

The previous prime is 21120030103. The next prime is 21120030119. The reversal of 21120030104 is 40103002112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120030103) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 17582 + ... + 206274.

It is an arithmetic number, because the mean of its divisors is an integer number (1311895035).

Almost surely, 2^21120030104 is an apocalyptic number.

It is an amenable number.

21120030104 is a deficient number, since it is larger than the sum of its proper divisors (20860611016).

21120030104 is a wasteful number, since it uses less digits than its factorization.

21120030104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189539 (or 189535 counting only the distinct ones).

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

Adding to 21120030104 its reverse (40103002112), we get a palindrome (61223032216).

The spelling of 21120030104 in words is "twenty-one billion, one hundred twenty million, thirty thousand, one hundred four".