21113116203 has 16 divisors (see below), whose sum is σ = 28226869760. Its totient is φ = 14037420096.

The previous prime is 21113116151. The next prime is 21113116237. The reversal of 21113116203 is 30261131112.

It is a de Polignac number, because none of the positive numbers 2^k-21113116203 is a prime.

It is a super-2 number, since 2×21113116203² (a number of 21 digits) contains 22 as substring.

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 21113116203.

It is not an unprimeable number, because it can be changed into a prime (21113116243) 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 15 ways as a sum of consecutive naturals, for example, 4877226 + ... + 4881552.

It is an arithmetic number, because the mean of its divisors is an integer number (1764179360).

Almost surely, 2^21113116203 is an apocalyptic number.

21113116203 is a deficient number, since it is larger than the sum of its proper divisors (7113753557).

21113116203 is a wasteful number, since it uses less digits than its factorization.

21113116203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21113116203 its reverse (30261131112), we get a palindrome (51374247315).

The spelling of 21113116203 in words is "twenty-one billion, one hundred thirteen million, one hundred sixteen thousand, two hundred three".