21113203365363 has 128 divisors (see below), whose sum is σ = 31468595364864. Its totient is φ = 12535750656000.

The previous prime is 21113203365337. The next prime is 21113203365391. The reversal of 21113203365363 is 36356330231112.

It is not a de Polignac number, because 21113203365363 - 2⁶ = 21113203365299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113203365263) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3639577063 + ... + 3639582863.

It is an arithmetic number, because the mean of its divisors is an integer number (245848401288).

Almost surely, 2^{21113203365363} is an apocalyptic number.

21113203365363 is a deficient number, since it is larger than the sum of its proper divisors (10355391999501).

21113203365363 is a wasteful number, since it uses less digits than its factorization.

21113203365363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6325.

The product of its (nonzero) digits is 174960, while the sum is 39.

Adding to 21113203365363 its reverse (36356330231112), we get a palindrome (57469533596475).

The spelling of 21113203365363 in words is "twenty-one trillion, one hundred thirteen billion, two hundred three million, three hundred sixty-five thousand, three hundred sixty-three".