21034404112 has 40 divisors (see below), whose sum is σ = 41387949216. Its totient is φ = 10354853376.

The previous prime is 21034404089. The next prime is 21034404121. The reversal of 21034404112 is 21140443012.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 241368 + ... + 316744.

Almost surely, 2^21034404112 is an apocalyptic number.

It is an amenable number.

21034404112 is a deficient number, since it is larger than the sum of its proper divisors (20353545104).

21034404112 is a wasteful number, since it uses less digits than its factorization.

21034404112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75655 (or 75649 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21034404112 its reverse (21140443012), we get a palindrome (42174847124).

The spelling of 21034404112 in words is "twenty-one billion, thirty-four million, four hundred four thousand, one hundred twelve".