21110075242 has 16 divisors (see below), whose sum is σ = 31765392000. Its totient is φ = 10521634320.

The previous prime is 21110075219. The next prime is 21110075243. The reversal of 21110075242 is 24257001112.

It is not an unprimeable number, because it can be changed into a prime (21110075243) 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, 3034384 + ... + 3041332.

It is an arithmetic number, because the mean of its divisors is an integer number (1985337000).

Almost surely, 2^21110075242 is an apocalyptic number.

21110075242 is a deficient number, since it is larger than the sum of its proper divisors (10655316758).

21110075242 is a wasteful number, since it uses less digits than its factorization.

21110075242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11541.

The product of its (nonzero) digits is 1120, while the sum is 25.

Adding to 21110075242 its reverse (24257001112), we get a palindrome (45367076354).

The spelling of 21110075242 in words is "twenty-one billion, one hundred ten million, seventy-five thousand, two hundred forty-two".