21110030353 has 4 divisors (see below), whose sum is σ = 21314982208. Its totient is φ = 20905078500.

The previous prime is 21110030317. The next prime is 21110030369. The reversal of 21110030353 is 35303001112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21110030353 - 2⁹ = 21110029841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21110030353.

It is not an unprimeable number, because it can be changed into a prime (21110030153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102475773 + ... + 102475978.

It is an arithmetic number, because the mean of its divisors is an integer number (5328745552).

Almost surely, 2^21110030353 is an apocalyptic number.

It is an amenable number.

21110030353 is a deficient number, since it is larger than the sum of its proper divisors (204951855).

21110030353 is a wasteful number, since it uses less digits than its factorization.

21110030353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204951854.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 21110030353 its reverse (35303001112), we get a palindrome (56413031465).

The spelling of 21110030353 in words is "twenty-one billion, one hundred ten million, thirty thousand, three hundred fifty-three".