21110424042 has 16 divisors (see below), whose sum is σ = 43202728800. Its totient is φ = 6873161232.

The previous prime is 21110424007. The next prime is 21110424089. The reversal of 21110424042 is 24042401112.

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, 40911417 + ... + 40911932.

It is an arithmetic number, because the mean of its divisors is an integer number (2700170550).

Almost surely, 2^21110424042 is an apocalyptic number.

21110424042 is an abundant number, since it is smaller than the sum of its proper divisors (22092304758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110424042 is a wasteful number, since it uses less digits than its factorization.

21110424042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81823397.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21110424042 its reverse (24042401112), we get a palindrome (45152825154).

The spelling of 21110424042 in words is "twenty-one billion, one hundred ten million, four hundred twenty-four thousand, forty-two".