21113004203 has 8 divisors (see below), whose sum is σ = 21466632000. Its totient is φ = 20759618880.

The previous prime is 21113004173. The next prime is 21113004221. The reversal of 21113004203 is 30240031112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21113004203 - 2⁶ = 21113004139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113004223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119423 + ... + 237671.

It is an arithmetic number, because the mean of its divisors is an integer number (2683329000).

Almost surely, 2^21113004203 is an apocalyptic number.

21113004203 is a deficient number, since it is larger than the sum of its proper divisors (353627797).

21113004203 is a wasteful number, since it uses less digits than its factorization.

21113004203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121237.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21113004203 its reverse (30240031112), we get a palindrome (51353035315).

The spelling of 21113004203 in words is "twenty-one billion, one hundred thirteen million, four thousand, two hundred three".