21113202435266 has 16 divisors (see below), whose sum is σ = 31815679677984. Its totient is φ = 10507994477184.

The previous prime is 21113202435253. The next prime is 21113202435307. The reversal of 21113202435266 is 66253420231112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2376335 + ... + 6919058.

It is an arithmetic number, because the mean of its divisors is an integer number (1988479979874).

Almost surely, 2^{21113202435266} is an apocalyptic number.

21113202435266 is a deficient number, since it is larger than the sum of its proper divisors (10702477242718).

21113202435266 is a wasteful number, since it uses less digits than its factorization.

21113202435266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300625.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 21113202435266 its reverse (66253420231112), we get a palindrome (87366622666378).

The spelling of 21113202435266 in words is "twenty-one trillion, one hundred thirteen billion, two hundred two million, four hundred thirty-five thousand, two hundred sixty-six".