21112665504335 has 16 divisors (see below), whose sum is σ = 26825714040096. Its totient is φ = 15896470975488.

The previous prime is 21112665504223. The next prime is 21112665504379. The reversal of 21112665504335 is 53340556621112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21112665504335 - 2¹⁰ = 21112665503311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10805984 + ... + 12609306.

It is an arithmetic number, because the mean of its divisors is an integer number (1676607127506).

Almost surely, 2^{21112665504335} is an apocalyptic number.

21112665504335 is a deficient number, since it is larger than the sum of its proper divisors (5713048535761).

21112665504335 is a wasteful number, since it uses less digits than its factorization.

21112665504335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941082.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 21112665504335 in words is "twenty-one trillion, one hundred twelve billion, six hundred sixty-five million, five hundred four thousand, three hundred thirty-five".