21113603105 has 16 divisors (see below), whose sum is σ = 28958166144. Its totient is φ = 14476715520.

The previous prime is 21113603099. The next prime is 21113603117. The reversal of 21113603105 is 50130631112.

It is not a de Polignac number, because 21113603105 - 2¹⁶ = 21113537569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771710 + ... + 798600.

It is an arithmetic number, because the mean of its divisors is an integer number (1809885384).

Almost surely, 2^21113603105 is an apocalyptic number.

It is an amenable number.

21113603105 is a deficient number, since it is larger than the sum of its proper divisors (7844563039).

21113603105 is a wasteful number, since it uses less digits than its factorization.

21113603105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49336.

The product of its (nonzero) digits is 540, while the sum is 23.

The spelling of 21113603105 in words is "twenty-one billion, one hundred thirteen million, six hundred three thousand, one hundred five".